Fish tank system with substrate cleaning function and substrate cleaning method

Abstract

The application discloses a fish tank system with bottom sand cleaning function and a bottom sand cleaning method, which comprises a fish tank body, further comprises a water pumping and filtering device, the bottom of the fish tank body is provided with at least two suction areas, each suction area is independently arranged and does not overlap with each other, at least one drain hole is arranged in each suction area, the position corresponding to each suction area below the fish tank body is independently provided with a drain branch pipe, each drain branch pipe is communicated with all the drain holes in the corresponding suction area, a control valve is installed on each drain branch pipe, the inlet end of the water pumping and filtering device is connected with a drain main pipe, all the drain branch pipes are communicated with the drain main pipe, the outlet end of the water pumping and filtering device is communicated with the fish tank body through a backwater pipe, and the water pumping and filtering device comprises a water pumping pump and a filter which are connected in sequence. The application greatly reduces the artificial burden, improves the cleaning efficiency, and effectively avoids the problems of hardening, root rot and water quality deterioration.

Description

Technical Field

[0001] This invention relates to the field of aquarium technology, specifically to a fish tank system and substrate cleaning method with substrate cleaning function. Background Technology

[0002] Substrate (also known as substrate) is an essential component of aquarium landscaping. It not only beautifies the tank but also provides a growing medium for aquatic plants. The substrate layer also acts as a biological filter, cultivating nitrifying bacteria and playing a vital role in maintaining water quality. However, after a period of use, fish waste and uneaten food accumulate on the substrate surface. If this organic waste is not cleaned regularly, it will harden, reducing the substrate's aeration and causing root rot in the aquatic plants due to lack of oxygen. Traditionally, substrate is manually cleaned periodically using a sand washer. However, for large or complex aquariums, this is not only labor-intensive and increases manpower, but the sand washer can also disturb the fish. Summary of the Invention

[0003] In view of the shortcomings of the prior art, the technical problem to be solved by the present invention is to provide an aquarium system with substrate cleaning function that can reduce the amount of manual cleaning work, reduce the burden on manpower, and reduce the impact on fish.

[0004] To solve the above-mentioned technical problems, the present invention adopts the following technical solution:

[0005] A fish tank system with substrate cleaning function includes a fish tank body and a water pumping and filtration device. The bottom of the fish tank body is provided with at least two suction areas, each suction area is independently set and does not overlap with each other, and each suction area is provided with at least one drain hole. Drainage branch pipes are independently set at the bottom of the fish tank body corresponding to the positions of each suction area, and each drainage branch pipe is connected to all the drain holes in the corresponding suction area. Each drainage branch pipe is equipped with a control valve. The inlet end of the water pumping and filtration device is connected to a main drain pipe, and all drainage branch pipes are connected to the main drain pipe. The outlet end of the water pumping and filtration device is connected to the fish tank body through a return water pipe. The water pumping and filtration device includes a water pump and a filter connected in sequence.

[0006] This invention integrates the suction area into the bottom of the tank. Fishkeepers only need to turn on the water pump and open each control valve in sequence to put each suction area into suction mode. The pore water containing impurities in the substrate is automatically extracted through the drain hole, drain branch pipe, and drain main pipe under negative pressure, and then filtered and returned to the aquarium. There is no need for manual operation by repeatedly inserting handheld equipment into the tank, which greatly reduces the burden of manual operation. At the same time, the suction process occurs inside the substrate layer and each zone works independently. The fish are always in the free movement space of the upper water body of the aquarium. There is no mechanical disturbance on the substrate surface, and the water flows smoothly rather than violently scouring. The disturbance to the aquarium environment is far less than the disturbance caused by frequent operation of a handheld sand cleaner in the tank. During the cleaning process, the original tank water is directly returned after being filtered through a closed loop, without the need for additional water changes, further reducing the maintenance burden.

[0007] As an optimization, the inner bottom surface of the aquarium body is provided with at least one partition, which divides the inner bottom surface of the aquarium body into at least two suction areas.

[0008] Due to aquascaping design requirements (such as creating undulating terrain and gentle slopes), there are significant height differences between different areas of the substrate within the aquarium. Without a partitioned structure, the substrate is interconnected, and water, driven by the negative pressure at the drain, preferentially flows along the thinnest and least resistant path of the substrate, causing the negative pressure at the drain to be primarily consumed in the thinnest area. In other areas, the seepage velocity is extremely low or even stagnant, making it impossible to remove impurities from the substrate surface. This invention divides the bottom of the aquarium into multiple independent suction zones by setting partitions. After the substrate is laid at the bottom of the aquarium, the partitions create discontinuity between zones, significantly reducing the area of ​​each independent zone relative to the entire aquarium area. This significantly reduces the height difference of the substrate within each zone, allowing the water flow to be relatively evenly distributed within each zone during suction, rather than concentrated in a localized area. Simultaneously, each zone operates independently through the alternating opening and closing of control valves. Each zone receives the full flow of the pump when it is its turn for suction, ensuring that each zone generates sufficient local seepage velocity to carry impurities through the substrate and remove them.

[0009] As an optimization, the aquarium body is also equipped with a bottom plate, which is located above the partition and is fixedly and sealed to the top edge of the partition and the inner wall of the aquarium body, so that each suction area forms a suction cavity. Several permeable holes are opened on the bottom plate corresponding to each suction cavity, and each permeable hole communicates with the corresponding suction cavity. The bottom plate completely separates the substrate layer from the suction cavity. The substrate is laid on the bottom plate, and during suction, negative pressure acts on the entire suction cavity. The suction force is evenly transmitted to various positions of the substrate layer above through the several permeable holes distributed on the bottom plate, changing the negative pressure from point-like suction to surface suction. This effectively avoids the unevenness caused by water flowing to a single drain hole in traditional single-hole solutions, significantly improving the clean coverage area and seepage uniformity of the substrate above each suction area.

[0010] As an optimization, at least some of the permeable holes are strip-shaped. The width of the strip-shaped holes can be controlled independently of the length. As long as the width of the strip-shaped holes is less than the particle size of the substrate sand, substrate sand loss can be effectively prevented. The length of the strip-shaped holes can be flexibly adjusted according to the cleaning area requirements, resulting in a larger water passage area under the same suction flow rate. This reduces the suction resistance per unit area, allowing the substrate sand above each suction area to obtain a stable and uniform seepage effect, further improving the uniformity and thoroughness of substrate sand cleaning.

[0011] As an optimization, suction pipes are respectively installed on the inner bottom surface of the aquarium body at positions corresponding to each suction area. Each suction pipe is connected to all drainage holes of the corresponding suction area, and each suction pipe has several suction holes. This significantly expands the effective suction coverage area within a single suction area, eliminates cleaning dead zones far from the drainage holes, makes the seepage rate of the substrate more uniform and consistent, and significantly improves the uniformity and thoroughness of substrate cleaning in each position within a single suction area.

[0012] As an optimization, the aquarium system also includes a controller, wherein the control valve is a solenoid valve. The controller is electrically connected to the water pump and each of the solenoid valves, and is used to control the opening and closing of the water pump and each of the solenoid valves respectively. Through the cooperation of the controller, the water pump and the solenoid valves, the suction process is automated, and the suction of each zone can be completed automatically according to a preset program without manual operation, further reducing the workload of humans.

[0013] As an optimization, the controller is configured to sequentially control the opening and closing of each of the solenoid valves according to a preset timing sequence, so that each of the suction zones enters the suction state in turn. When the total flow rate of the water pump is small, each zone can obtain the full flow rate when it is its turn to be suctioned, thereby forming a sufficient local seepage velocity in that zone to carry impurities through the bottom sand layer.

[0014] As an optimization, the controller is configured to either open only one of the solenoid valves at a time, or simultaneously open two spatially adjacent solenoid valves. When only one solenoid valve is opened at a time, the entire flow rate of the water pump is concentrated on a single zone, creating the maximum seepage velocity within that zone and providing the strongest suction capability for stubborn impurities. When two spatially adjacent solenoid valves are opened simultaneously, two adjacent zones are suctioned at the same time, increasing the coverage area of ​​a single suction, which is suitable for scenarios with high cleaning speed requirements.

[0015] This invention also discloses a method for cleaning aquarium substrate, applicable to the aquarium system described above, comprising the following steps:

[0016] (1) Start the water pump in the water pumping and filtration device;

[0017] (2) By opening the control valves on each drainage branch pipe in sequence, the drainage branch pipes corresponding to each suction area are connected to the main drainage pipe and the water pumping and filtration device in sequence, and each suction area enters the suction state in sequence; when each suction area enters the suction state, the bottom sand pore water in the suction area generates seepage flow towards the drainage hole under the negative pressure drive, and the impurities on the surface of the bottom sand are carried by the seepage water flow and pass through the pores between the bottom sand particles to the drainage hole and are extracted.

[0018] (3) After each suction area maintains the suction state for a preset time, the current control valve is closed and the next batch of control valves is opened to switch to the next batch of suction areas.

[0019] (4) After completing one round of suction in all suction areas, repeat steps (2) to (3) several times.

[0020] As an optimization, the preset duration is set to 10-15 minutes.

[0021] Compared with the prior art, the present invention has the following beneficial effects: by dividing the bottom surface of the aquarium into multiple independent suction areas, the present invention not only reduces the interference with the aquarium environment, but also achieves uniform cleaning of the entire area, greatly reduces the manual burden, improves cleaning efficiency, and effectively avoids hardening, root stagnation and water quality deterioration. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the internal structure of the side of Embodiment 1 of the present invention;

[0023] Figure 2 This is a schematic diagram of the internal structure of the side of Embodiment 2 of the present invention;

[0024] Figure 3 This is a schematic diagram of the internal structure of the side of Embodiment 3 of the present invention;

[0025] Figure 4This is a schematic diagram of the internal structure of the side of Embodiment 4 of the present invention;

[0026] Figure 5 This is a top view of the fish tank body according to Embodiment 5 of the present invention. Detailed Implementation

[0027] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. The components of the embodiments of the present invention described and shown in the accompanying drawings can generally be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0028] Example 1

[0029] like Figure 1 As shown, the aquarium system with substrate cleaning function in this specific embodiment includes an aquarium body 1. A substrate layer 2 is laid on the inner bottom surface of the aquarium body 1. The substrate layer 2 is a laying material during use and is not a component of the aquarium system. The aquarium structure also includes a water pumping and filtration device, which consists of a water pump 3 and a filter 4.

[0030] The bottom of the aquarium body 1 has four suction zones. Drainage holes are provided at the bottom of each suction zone, with the number of drainage holes for each zone determined by the size of the aquarium; in this embodiment, there is one. A suction zone refers to the area of ​​substrate suction controlled independently by the same drainage branch pipe and its connected drainage holes. Drainage branch pipes 6 are independently installed at the bottom of the aquarium body 1, corresponding to each suction zone. Each drainage branch pipe connects to all drainage holes within its corresponding suction zone. A control valve 9, a solenoid valve, is installed on each drainage branch pipe 6 and is electrically connected to a controller, which automatically controls its opening and closing. A water pump 3 is also electrically connected to the controller, which controls its start and stop, thus automating the cleaning process. The inlet of the water pumping and filtration device is connected to the main drain pipe 7, and all the branch drain pipes 6 are connected to the main drain pipe 7. The outlet of the water pumping and filtration device is connected to the aquarium body 1 through the return water pipe 8. The water pumping and filtration device includes a water pump 3 and a filter 4 connected in sequence, which are used to filter and purify the water containing impurities and send it back to the aquarium.

[0031] The aquarium system also includes a controller, which is electrically connected to the water pump 3 and each solenoid valve, and is used to control the opening and closing of the water pump 3 and the solenoid valves respectively. The controller can be implemented using a programmable logic controller (PLC), a microcontroller, or an embedded system. It has preset control timing and can automatically perform cleaning operations according to the set program. Users can also manually start or stop the cleaning program through the controller as needed. The controller can also automatically start the cleaning program at preset time intervals (such as cleaning several times a day) to achieve fully automated operation.

[0032] The working principle of this invention is based on the fundamental physical principle of porous media seepage. The substrate layer 2 is essentially a porous medium with numerous pores between the sand particles. When the water pump 3 starts, it creates negative pressure at the drain hole through the pipeline. Driven by the pressure difference, the water in the substrate pores flows directionally towards the drain hole. After fish waste and food residue accumulate on the surface of the substrate layer 2, when the control valve 9 of a certain suction area is opened, that area is connected to the water pumping and filtration device. The negative pressure created by the water pump 3 at the drain hole causes the water in the substrate pores of that area to seep towards the drain hole. Under the continuous flushing and carrying action of the seeping water, the fish waste and food residue on the surface of the substrate are gradually broken into fine particles suspended in the water. These particles are carried by the water flow through the pores between the substrate particles to the drain hole, and then enter the water pumping and filtration device through the drain branch pipe 6 and the main drain pipe 7. The water containing impurities is filtered and purified by the filter 4 and then returns to the aquarium body 1 through the return water pipe 8, completing a complete cleaning cycle.

[0033] The controller is configured to sequentially open and close each control valve 9 according to a preset timing sequence, causing each suction zone to enter the suction state in turn. The controller can be configured to open only one control valve 9 at a time, meaning suction is applied to only one suction zone at a time, or it can be configured to simultaneously open two spatially adjacent control valves 9, meaning suction is applied to two adjacent suction zones simultaneously. With a fixed flow rate from the water pump 3, the fewer control valves opened simultaneously, the greater the suction flow rate allocated to each suction zone, and the stronger the suction capacity for impurities. After each suction zone maintains the suction state for a preset time (preferably 10 to 15 minutes), the controller closes the current control valve 9 and opens the next control valve 9, switching to the next suction zone. After completing one round of suction in all suction zones, the above process is repeated several times. The specific number of execution rounds can be set, and it can even operate continuously for 24 hours. This invention does not require that all impurities be extracted from each zone in one suction. Instead, it allows the impurities to move a certain distance towards the drain hole in the substrate each time. After multiple repetitions, the impurities are gradually and completely extracted. This method avoids excessive local water flow caused by prolonged suction in a single zone, while making the entire cleaning process more stable and efficient.

[0034] The more suction zones there are, the smaller the area of ​​each zone, and the lower the required pump flow rate. However, too many zones increase the number of pipes and control valves, raising system costs. Considering both cleaning effectiveness and system cost, the optimal number of suction zones is 4 to 8, and the rated flow rate of pump 3 is preferably 1000 L / h to 1500 L / h. Within this range, each zone can obtain sufficient suction flow to create effective seepage in the substrate, while balancing system cost and cleaning efficiency.

[0035] The suction time is related to factors such as substrate thickness, substrate particle size, and water pump flow rate. When the substrate thickness is thinner (e.g., 3cm to 6cm), the path for impurities to pass through is shorter, so a shorter suction time (e.g., 10 to 12 minutes) can be used. When the substrate thickness is thicker (e.g., 6cm to 10cm), the path for impurities to pass through is longer, so a longer suction time is required (e.g., 12 to 15 minutes). Users can preset or adjust the above parameters in real time through the controller according to the actual situation of the aquarium.

[0036] Filter 4 can be a physical filter (such as filter cotton, filter screen, etc.), a biological filter (such as bio-balls, ceramic rings, etc., filter media for cultivating nitrifying bacteria), or a combination of physical and biological filters. The specific type and specifications of the filter can be reasonably selected by those skilled in the art based on factors such as the water volume of the aquarium and the stocking density.

[0037] A method for cleaning aquarium substrate, applied to the aquarium system as described above, includes the following steps:

[0038] (1) Start the water pump 3 in the water pumping and filtration device;

[0039] (2) By opening the control valve 9 on each drainage branch pipe 6 in sequence, the drainage branch pipe 6 corresponding to each suction area is connected to the main drainage pipe 7 and the water pumping and filtering device in sequence, and each suction area enters the suction state in sequence; when each suction area enters the suction state, the bottom sand pore water in the suction area generates seepage flow towards the drainage hole under the negative pressure drive, and the impurities on the surface of the bottom sand are carried by the seepage water flow and pass through the pores between the bottom sand particles to the drainage hole and are extracted.

[0040] (3) After each suction area maintains the suction state for a preset time, the current control valve 9 is closed and the next batch of control valves 9 is opened to switch to the next batch of suction areas.

[0041] (4) After completing one round of suction in all suction areas, repeat steps (2) to (3) several times.

[0042] Example 2

[0043] like Figure 2As shown, the inner bottom surface of the aquarium body 1 is provided with three partitions 5, dividing the inner bottom surface into four suction areas, but the number of partitions is not limited to this. The partitions 5 are sealed and fixed to the bottom surface of the aquarium body 1 (e.g., by adhesive glue) to ensure complete isolation between the suction areas, preventing water from flowing laterally between the areas. The height of the partitions 5 is lower than the upper surface of the substrate layer 2 laid inside the aquarium body 1 in the corresponding area, meaning that the partitions 5 are completely covered by the substrate and not exposed, which will not affect the aesthetics of the aquarium landscape or hinder the normal activities of the fish.

[0044] Example 3

[0045] like Figure 3 As shown, a bottom plate 10 is also provided inside the fish tank body 1. The bottom plate 10 is located above the partition 5, and the bottom plate 10 is fixedly and sealed to the top edge of the partition 5 and the inner side wall of the fish tank body 1. The fixed and sealed connection of the bottom plate 10 can be achieved by means of adhesive such as glass glue, to ensure that each suction chamber below the bottom plate 10 is independent and well-sealed, and that the negative pressure of each chamber will not be interconnected during suction.

[0046] The bottom plate 10 divides the interior of the aquarium body 1 into upper and lower layers: the upper layer is a substrate layer, and the lower layer consists of several independent suction chambers formed by partitions 5, each corresponding to a suction area. Several permeable holes 11 are provided on the bottom plate 10 at positions corresponding to each suction chamber, and each permeable hole 11 communicates with its corresponding suction chamber. During suction, negative pressure is transmitted through the drain holes to the corresponding suction chambers, and then acts on the substrate layer 2 below through the permeable holes 11, forming a uniform planar negative pressure distribution.

[0047] The permeable holes 11 are arranged in an array on the base plate 10, covering the entire upper area of ​​the suction chamber. The diameter of the permeable holes 11 should be smaller than the particle size of the bottom sand laid on the base plate 10 to prevent the bottom sand from falling into the suction chamber through the permeable holes 11. Sand-proof nets can also be installed at the permeable holes 11 as an additional protection against bottom sand loss.

[0048] At least some of the permeable holes 11 are strip-shaped holes, which have higher water flow efficiency per unit area compared to circular holes. During suction, the water flow velocity through the strip-shaped holes into the suction chamber is more gradual and uniform. The length direction of the strip-shaped holes is parallel to the extension direction of the partition 5 to make the negative pressure distribution within the same suction chamber more uniform. The length of the strip-shaped holes is preferably 10-30 mm, and the width is preferably 3-5 mm.

[0049] Example 4

[0050] like Figure 4As shown, this invention allows for the installation of multiple filters 4 operating in parallel, depending on the actual capacity of the aquarium, stocking density, and cleaning requirements. Specifically, the water pumping and filtration device includes two or more filters 4, each connected in parallel to a water pump. Each filter 4 has a solenoid valve installed at its inlet. Each solenoid valve is electrically connected to a controller. The controller can selectively deliver impurity-laden water from each suction area to the corresponding filter 4 for filtration and purification by controlling the opening and closing of the solenoid valves. For example, when the aquarium is divided into four suction areas by a partition 5 and equipped with two parallel filters 4, the first filter 4 can be used to treat the water in the first and second suction areas, and the second filter 4 can be used to treat the water in the third and fourth suction areas. During the alternating suction process, when the solenoid valve of the first or second suction area is opened, the solenoid valve corresponding to the front end of the first filter 4 is simultaneously opened, allowing the impurity-laden water to flow back to the aquarium after filtration by that filter 4; when the solenoid valve of the third or fourth suction area is opened, the solenoid valve corresponding to the front end of the second filter 4 is simultaneously opened.

[0051] Multiple filters 4 operate in parallel, with each filter 4 undertaking the filtration task of its corresponding suction area. Each filter 4 works independently and does not interfere with each other, which can meet the filtration needs of large aquariums or aquariums with high breeding density.

[0052] Example 5

[0053] like Figure 5 As shown, the bottom of the aquarium body 1 is divided into four suction areas, each with its own suction tube 12. Each suction tube 12 is connected to all the drain holes in its corresponding suction area. In this embodiment, each suction area has a drain hole at its bottom, and one end or the middle of the suction tube 12 is connected to the drain hole. The suction tube 12 is laid flat on the inner bottom surface of the aquarium body 1. The suction tubes 12 corresponding to two suction areas are circular in shape, while the suction tubes 12 corresponding to the other two suction areas are rectangular in shape, arranged around the center of each suction area. Of course, the shape of the suction tubes 12 in each suction area can be the same or different, and users can flexibly configure them according to the aquascape layout and cleaning needs of different areas. The suction tube 12 has several suction holes evenly spaced along its length. These holes are distributed along the remaining wall of the tube 12, excluding the area in contact with the inner bottom surface of the aquarium body 1. Specifically, the suction holes can be located on the top, sides, or at an angle, as long as their openings face the substrate layer 2. This allows for direct suction of pore water and impurities from the substrate layer 2. The diameter of the suction tube 12 and the diameter of the suction holes can be adjusted according to the substrate particle size and the size of the aquarium.

[0054] In practical use, users can flexibly choose the shape and position of the suction pipes 12 in each suction area according to the aquascape layout in the aquarium. For example, in a suction area with aquatic plants, the suction pipes 12 can be arranged as a ring or rectangle around the aquatic plant area, so that the suction holes avoid the area directly below the roots of the aquatic plants, thus avoiding excessive suction on the roots of the aquatic plants.

[0055] The suction tube 12 can be made of rigid plastic tubing (such as PVC or ABS), requiring sufficient structural strength to withstand the pressure of the upper substrate layer 2 without significant deformation. It should also be resistant to water corrosion and clogging. The suction tube 12 is detachably connected to the drain hole via a sealed joint, ensuring no leakage at the connection and preventing negative pressure loss during suction. When a suction tube 12 in a certain suction area becomes clogged, only the suction tube 12 in that area needs to be removed for cleaning or replacement; there is no need to disassemble the tubing in other areas, reducing the system's maintenance difficulty and cost. The suction tube 12 is completely buried within the substrate layer 2, without being exposed, thus not affecting the aquarium's aesthetics or the normal activity of the fish.

[0056] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit the technical solutions. Those skilled in the art should understand that any modifications or equivalent substitutions to the technical solutions of the present invention without departing from the spirit and scope of the present invention should be covered within the scope of the claims of the present invention.

Claims

1. A fish tank system with substrate cleaning function, comprising a fish tank body, characterized in that: It also includes a water pumping and filtration device. The bottom of the aquarium body has at least two suction areas, each suction area is set independently and does not overlap with each other. Each suction area has at least one drain hole. The bottom of the aquarium body has a drain branch pipe corresponding to the position of each suction area. Each drain branch pipe is connected to all the drain holes in the corresponding suction area. Each drain branch pipe is equipped with a control valve. The inlet end of the water pumping and filtration device is connected to the main drain pipe. All drain branch pipes are connected to the main drain pipe. The outlet end of the water pumping and filtration device is connected to the aquarium body through a return water pipe. The water pumping and filtration device includes a water pump and a filter connected in sequence.

2. The aquarium system with substrate cleaning function according to claim 1, characterized in that: The inner bottom surface of the aquarium body is provided with at least one partition, which divides the inner bottom surface of the aquarium body into at least two suction areas.

3. The aquarium system with substrate cleaning function according to claim 2, characterized in that: The aquarium body is also provided with a bottom plate, which is located above the partition. The bottom plate is fixedly and sealed to the top edge of the partition and the inner side wall of the aquarium body, so that each suction area forms a suction cavity. The bottom plate is provided with a number of water permeable holes at the positions corresponding to each suction cavity, and each water permeable hole is connected to the corresponding suction cavity.

4. The aquarium system with substrate cleaning function according to claim 3, characterized in that: At least some of the permeable holes are strip-shaped holes.

5. The aquarium system with substrate cleaning function according to claim 1, characterized in that: The inner bottom surface of the aquarium body is provided with suction pipes corresponding to the suction areas. Each suction pipe is connected to all the drain holes of the corresponding suction area, and each suction pipe has several suction holes.

6. The aquarium system with substrate cleaning function according to claim 1, characterized in that: The aquarium system also includes a controller, wherein the control valve is a solenoid valve. The controller is electrically connected to the water pump and each of the solenoid valves respectively, and is used to control the opening and closing of the water pump and each of the solenoid valves respectively.

7. The aquarium system with substrate cleaning function according to claim 6, characterized in that: The controller is configured to control the opening and closing of each of the solenoid valves in a preset sequence, so that each of the suction areas enters the suction state in turn.

8. The aquarium system with substrate cleaning function according to claim 7, characterized in that: The controller is configured to open only one of the solenoid valves at a time, or to open two spatially adjacent solenoid valves simultaneously.

9. A method for cleaning aquarium substrate, applied to an aquarium system as described in any one of claims 1 to 8, characterized in that: Includes the following steps: (1) Start the water pump in the water pumping and filtration device; (2) By opening the control valves on each drainage branch pipe in sequence, the drainage branch pipes corresponding to each suction area are connected to the main drainage pipe and the water pumping and filtration device in sequence, and each suction area enters the suction state in sequence; when each suction area enters the suction state, the bottom sand pore water in the suction area generates seepage flow towards the drainage hole under the negative pressure drive, and the impurities on the surface of the bottom sand are carried by the seepage water flow and pass through the pores between the bottom sand particles to the drainage hole and are extracted. (3) After each suction area maintains the suction state for a preset time, the current control valve is closed and the next batch of control valves is opened to switch to the next batch of suction areas. (4) After completing one round of suction in all suction areas, repeat steps (2) to (3) several times.

10. The method for cleaning aquarium substrate according to claim 9, characterized in that: The preset duration is 10-15 minutes.

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