Novel back filter fish tank

Abstract

The utility model discloses a novel back filter fish tank, including cylinder body, filter cotton box and water outlet device, the rear side fixed with baffle in the middle part of cylinder body interior, baffle divides the fish -breeding area and filter area for cylinder body, and the both ends of baffle are all provided with the through hole of uniform distribution, and the water flow enters from the through hole, and under the action of water turning plate, first filtering is carried out in filter cotton box, and then flows into the lower filter groove and breeds bacteria, under the action of first and second flow guide plate, flows into the second layer physical filter again and then flows into the lower bacteria breeding bin, and then enters the water pump bin, under the action of water pump, through the drainage buckle of water pipe and water outlet device, flows into the fish -breeding area again. The novel filter back filter fish tank improves the small physical filter area of the back filter fish tank usually existing, the inconvenient filter cotton replacement, the incomplete filtration and other problems, and in the long-term use process, the pollutants such as fish manure and residual feed are easy to accumulate, cause the water quality to drop, endanger the health of fish, affect the ornamental effect of fish tank and other problems, further strengthen the use convenience and practicality of back filter fish tank.

Description

Technical Field

[0001] This utility model relates to the field of aquarium technology, specifically a novel back-filter aquarium. Background Technology

[0002] An aquarium is a transparent container, usually made of glass, used to keep live fish. It not only provides a habitat for fish but also adds enjoyment and interaction to family life, creating a vibrant living space for the fish and beautifying the living environment. However, existing back-filter aquariums typically suffer from problems such as small physical filtration area, inconvenient filter media replacement, and incomplete filtration. Over long-term use, pollutants such as fish waste and leftover food easily accumulate, leading to a decline in water quality. This not only harms the health of the fish but also affects the aquarium's aesthetic appeal. Furthermore, cleaning and maintenance are arduous, time-consuming, and labor-intensive, further reducing the ease of use and practicality.

[0003] Therefore, this utility model proposes a novel back-filtered aquarium to solve the above-mentioned problems. Utility Model Content

[0004] The purpose of this utility model is to provide a novel back-filter aquarium to solve the problems mentioned in the background art, such as the small physical filtration area, inconvenient filter cotton replacement, incomplete filtration, and heavy cleaning and maintenance work, which further reduces the convenience and practicality of use.

[0005] To achieve the above objectives, this utility model provides the following technical solution: a novel back-filtered aquarium, comprising a tank body, The cylinder body is fixedly installed with a partition, and the partition is provided with a first water inlet grille and a second water inlet grille through the upper and lower sides of both the left and right ends. The upper middle part of the partition is provided with a first water outlet; The cylinder body has a first vertical plate and a second vertical plate fixedly installed on the inner walls of the left and right sides, and the front sides of the first vertical plate and the second vertical plate are fixedly connected to the rear side of the partition. The bottom of the first vertical plate and the vertical plate is provided with an arc-shaped opening. A first water-discharging plate is fixedly installed on the left side of the first upright plate, and the bottom surface of the first water-discharging plate is fixedly connected to the inner bottom surface of the cylinder body, and the first water-discharging plate is located on the rear side of the partition plate. A second water-discharging plate is fixedly installed on the right side of the second vertical plate, and the bottom surface of the second water-discharging plate is fixedly connected to the inner bottom surface of the cylinder body, and the second water-discharging plate is located on the rear side of the partition plate. A first bracket is installed on the top surface of the first water-turning plate, and the rear side and left side of the first bracket are fixedly connected to the left inner wall of the cylinder and the left side of the first vertical plate, respectively. A first filter box is movably installed on the first bracket. The top surface of the second water-tumbling plate is equipped with a second bracket, and the rear side and right side of the second bracket are fixedly connected to the right inner wall of the cylinder and the left side of the second vertical plate, respectively. The second bracket is movably equipped with a second filter box. A third upright plate is fixedly installed on the right side of the first upright plate. The rear side and bottom surface of the third upright plate are fixedly connected to the rear inner wall surface and inner bottom surface of the cylinder body, respectively. The third upright plate is also fixedly connected to the rear side of the partition plate. A fourth upright plate is fixedly installed on the left side of the second upright plate. The rear side and bottom surface of the fourth upright plate are fixedly connected to the rear inner wall surface and inner bottom surface of the cylinder body, respectively. The fourth upright plate is also fixedly connected to the rear side of the partition plate. The top surfaces of the third vertical plate and the fourth vertical plate are respectively equipped with a first guide plate and a second guide plate. The rear side and front side of the first guide plate and the second guide plate are respectively fixedly connected to the rear inner wall of the cylinder and the rear side of the partition. A fifth upright plate is fixedly installed on the right side of the third upright plate. The rear side of the fifth upright plate is fixedly connected to the rear inner wall of the cylinder body, and the fifth upright plate is fixedly connected to the rear side of the partition plate. A sixth upright plate is fixedly installed on the left side of the fourth upright plate. The rear side of the sixth upright plate is fixedly connected to the rear inner wall of the cylinder body, and the sixth upright plate is fixedly connected to the rear side of the partition plate.

[0006] The above technical solution facilitates the filtration and circulation of water in the fish tank, thereby improving water quality.

[0007] As a preferred technical solution of this utility model, a water pump is fixedly installed on the inner bottom surface of the cylinder, and the water pump is located on the right side of the fifth vertical plate. The water outlet end of the water pump is fixedly connected to the bottom end of the water pipe, and a water outlet device is fixedly installed at the top end of the water pipe, and the water outlet device is connected to the first water outlet.

[0008] The above technical solution facilitates the circulation of water through a water pump.

[0009] As a preferred technical solution of this utility model, a third bracket is installed on the upper right side of the third upright plate and the upper left side of the fifth upright plate. The front side, rear side, left side, and right side of the third bracket are fixedly connected to the rear side of the partition, the rear inner wall of the cylinder, the right side of the third upright plate, and the left side of the fifth upright plate, respectively. The top of the third bracket can hold a third filter cotton support plate or a first filter bag support plate.

[0010] As a preferred technical solution of this utility model, a fourth bracket is installed on the upper left side of the fourth upright plate and the upper right side of the sixth upright plate. The front side, rear side, left side, and right side of the fourth bracket are fixedly connected to the rear side of the partition, the rear inner wall of the cylinder, the left side of the fourth upright plate, and the right side of the sixth upright plate, respectively. The top of the fourth bracket can hold a fourth filter cotton tray or a second filter bag tray.

[0011] Using the above technical solution, the already filtered water can be filtered a second time to improve the water quality. Furthermore, the filter cotton or filter bag of different densities can be flexibly replaced according to the breeding situation, making it practical and convenient.

[0012] As a preferred embodiment of this utility model, a multi-functional compartment is provided on the left side of the second upright plate, and the multi-functional compartment is located on the right side of the fourth upright plate.

[0013] By adopting the above technical solution, heating rods, sterilizing lamps, and other equipment can be placed in a multi-functional compartment, making it easy to hide the equipment and ensuring the overall aesthetics of the fish tank.

[0014] As a preferred embodiment of this utility model, the water outlet device includes: a main pipe, which is a three-way pipe structure with a hollow design, including a first port, a second port, and a third port. The central axes of the three ports intersect. The first port can be connected to the aquarium water outlet pipe, and its inner wall is threaded. The second port and the third port are smooth interfaces that can be tightly connected to the first hollow round pipe and the second hollow round pipe. The first hollow round pipe and the second hollow round pipe have evenly distributed through water outlet holes, and the first hollow round pipe and the second hollow round pipe are rotatable to change the water outlet direction. The left end of the first hollow round pipe is provided with a first plug, and the right end of the second hollow round pipe is provided with a second plug. The bottom of the main pipe has a through hole.

[0015] By adopting the above technical solution, the formation of a local slow flow zone at the bottom of the outlet is avoided by the through hole at the bottom of the main pipe, thus enhancing the filtration effect; and the first hollow round pipe and the second hollow round pipe can be rotated, which can effectively adjust the water outlet direction and make it easier to adapt to the needs of different breeding environments.

[0016] As a preferred embodiment of this utility model, the filter box includes a housing, and a handle is fixedly installed on the top surface of the housing; The inner wall of the housing is movably installed with a water distribution plate, a first filter cotton support plate and a second filter cotton support plate from top to bottom, and square inverted conical drain holes are evenly opened through the water distribution plate, the first filter cotton support plate and the second filter cotton support plate.

[0017] The above technical solution facilitates graded filtration of water, improves filtration efficiency, and ensures smooth drainage through the design of square inverted conical drain holes.

[0018] As a preferred technical solution of this utility model, the filter box further includes an air inlet pipe and an air vent. The air inlet pipe is fixedly disposed through the water distribution plate, and the air vent is disposed through the front side wall of the housing, and the air vent is located between the first filter cotton support plate and the second filter cotton support plate.

[0019] By adopting the above technical solution, it is easy to avoid the formation of negative pressure inside the filter box and reduce the water flow rate through the air inlet pipe and the air vent, thus ensuring filtration efficiency.

[0020] Compared with the prior art, the beneficial effects of this utility model are: the new back-filtered aquarium can effectively filter and circulate water, improve water quality, ensure a healthy living environment for fish, enhance the aesthetics of the aquarium, solve the problem of time-consuming and laborious cleaning of the aquarium, and improve the practicality of the aquarium.

[0021] 1. Water enters through the inlet grille and changes its direction under the action of the water-turning plate, so that the water flows through the filter box for filtration. After filtration, it enters the multi-functional chamber, where it can be sterilized or kept warm. It is then filtered a second time by filter cotton or filter bag to further improve the health of the water quality. Subsequently, the water flows into the area where the water pump is located. The water pump draws the water through the water pipe and flows out through the water outlet device. Under the diversion control of the water outlet device, it achieves all-round effective circulation, thereby improving the health of the water quality. 2. Through the water flow of the bracket and filter cotton box, the design of the air inlet pipe and the air vent effectively avoids the formation of negative pressure space between the water distribution plate and the first filter cotton support plate, and between the first filter cotton support plate and the second filter cotton support plate, thereby ensuring filtration efficiency.

[0022] 3. The filter box and bracket are connected in a movable manner, which makes it easy to remove the filter box by carrying it. At the same time, the water distribution plate, the first filter cotton tray and the second filter cotton tray are installed in a movable manner, which makes it easy to disassemble and clean. Attached Figure Description

[0023] Figure 1 This is a three-dimensional structural diagram of the present invention; Figure 2This is an exploded view of the three-dimensional structure of this utility model; Figure 3 This is a top-view three-dimensional structural diagram of the present invention; Figure 4 This is a rear-view three-dimensional structural diagram of the present invention; Figure 5 This is a rear view of the present invention; Figure 6 This is a schematic diagram of the three-dimensional structure of the filter box of this utility model; Figure 7 This is a three-dimensional cross-sectional view of the filter box of this utility model; Figure 8 This is a schematic diagram of the split structure of the water outlet device of this utility model; Figure 9 This is a three-dimensional structural diagram of the water outlet device of this utility model.

[0024] In the diagram: 1. Cylinder block; 2. Baffle plate; 201. First inlet grille; 202. Second inlet grille; 203. First outlet; 3. First vertical plate; 4. Second vertical plate; 401. Multifunctional compartment; 5. First water-discharging plate; 6. Second water-discharging plate; 7. First bracket; 8. First filter box; 801. Shell; 802. Handle; 803. Water distribution plate; 804. First filter cotton support plate; 805. Second filter cotton support plate; 806. Air inlet pipe; 807. Ventilation groove; 9. Second bracket; 10. Second filter box; 11. Third vertical plate; 12. Fourth vertical plate; 13. First guide... 14. Flow plate; 15. Second guide plate; 16. Fifth vertical plate; 17. Sixth vertical plate; 18. Water pump; 19. Water pipe; 10. Water outlet device; 1901. Main pipe fitting; 1902. First port; 1903. Second port; 1904. Third port; 1905. First hollow round pipe; 1906. Second hollow round pipe; 1907. First plug; 1908. Second plug; 1909. Through hole; 20. Third bracket; 21. Third filter cotton support plate; 22. First filter bag support plate; 23. Fourth bracket; 24. Fourth filter cotton support plate; 25. Second filter bag support plate. Detailed Implementation

[0025] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0026] Please see Figure 1-8The present invention provides a novel back-filtered aquarium, comprising a tank body 1, a partition 2 fixedly installed inside the tank body 1, and a first water inlet grille 201 and a second water inlet grille 202 through the upper and lower sides of the left and right ends of the partition 2, and a first water outlet 203 through the upper middle part of the partition 2. The first vertical plate 3 and the second vertical plate 4 are fixedly installed on the inner walls of the left and right sides of the cylinder body 1, and the front side of the first vertical plate 3 and the second vertical plate 4 are fixedly connected to the rear side of the partition plate 2, and the bottom of the first vertical plate 3 and the vertical plate 4 are provided with arc-shaped openings. The first water-turning plate 5 is fixedly installed on the left side of the first upright plate 3, and the bottom surface of the first water-turning plate 5 is fixedly connected to the inner bottom surface of the cylinder body 1, and the first water-turning plate 5 is located on the rear side of the partition plate 2. The second water-turning plate 6 is fixedly installed on the right side of the second vertical plate 4, and the bottom surface of the second water-turning plate 6 is fixedly connected to the inner bottom surface of the cylinder body 1, and the second water-turning plate 6 is located on the rear side of the partition plate 2. The first bracket 7 is installed on the top surface of the first water-turning plate 5, and the rear side and left side of the first bracket 7 are fixedly connected to the left inner wall of the cylinder 1 and the left side of the first vertical plate 3, respectively. The first filter box 8 is movably installed on the first bracket 7. The top surface of the second water-turning plate 6 is equipped with a second bracket 9, and the rear side and right side of the second bracket 9 are fixedly connected to the right inner wall of the cylinder 1 and the left side of the second vertical plate 4, respectively. The second bracket 9 is movably equipped with a second filter box 10. A third vertical plate 11 is fixedly installed on the right side of the first vertical plate 3. The rear side and bottom surface of the third vertical plate 11 are fixedly connected to the rear inner wall surface and inner bottom surface of the cylinder body 1, respectively. The third vertical plate 11 is also fixedly connected to the rear side of the partition plate 2. A fourth vertical plate 12 is fixedly installed on the left side of the second vertical plate 4. The rear side and bottom surface of the fourth vertical plate 12 are fixedly connected to the rear inner wall surface and inner bottom surface of the cylinder body 1, respectively. The fourth vertical plate 12 is also fixedly connected to the rear side of the partition plate 2. The top surfaces of the third vertical plate 11 and the fourth vertical plate 12 are respectively equipped with a first guide plate 13 and a second guide plate 14. The rear side and front side of the first guide plate 13 and the second guide plate 14 are respectively fixedly connected to the rear inner wall of the cylinder body 1 and the rear side of the partition plate 2. A fifth vertical plate 15 is fixedly installed on the right side of the third vertical plate 11. The rear side of the fifth vertical plate 15 is fixedly connected to the rear inner wall of the cylinder body 1, and the fifth vertical plate 15 is fixedly connected to the rear side of the partition plate 2. A sixth vertical plate 16 is fixedly installed on the left side of the fourth vertical plate 12. The rear side of the sixth vertical plate 16 is fixedly connected to the rear inner wall of the cylinder 1, and the sixth vertical plate 16 is fixedly connected to the rear side of the partition plate 2. A water pump 17 is fixedly installed on the inner bottom surface of the cylinder 1, and the water pump 17 is located on the right side of the fifth vertical plate 15. The water outlet end of the water pump 17 is fixedly connected to the bottom end of the water pipe 18, and the top end of the water pipe 18 is fixedly connected to the water outlet device 19, which is connected to the first water outlet 203.

[0027] A third bracket 20 is installed on the upper right side of the third upright plate 11 and the upper left side of the fifth upright plate 15. The front side, rear side, left side and right side of the third bracket 20 are fixedly connected to the rear side of the partition plate 2, the rear inner wall of the cylinder 1, the right side of the third upright plate 11 and the left side of the fifth upright plate 15, respectively. The top of the third bracket 20 can hold the third filter cotton tray 21 or the first filter bag tray 22. A fourth bracket 23 is installed on the upper left side of the fourth upright plate 12 and the upper right side of the sixth upright plate 16. The front side, rear side, left side and right side of the fourth bracket 23 are fixedly connected to the rear side of the partition plate 2, the rear inner wall of the cylinder 1, the left side of the fourth upright plate 12 and the right side of the sixth upright plate 16, respectively. The top of the fourth bracket 23 can hold the fourth filter cotton tray 24 or the second filter bag tray 25. The second upright plate 4 has a multi-functional compartment 401 on its left side, and the multi-functional compartment is located on the right side of the fourth upright plate 12. The water outlet device 19 includes: a main pipe component 1901, which is a three-way pipe structure and is hollow. It includes a first port 1902, a second port 1903 and a third port 1904, and the central axes of the three ports intersect each other. The first port 1902 can be connected to the aquarium outlet pipe, and its inner wall is threaded. The second port 1903 and the third port 1904 are smooth interfaces that can be tightly connected to the first hollow round tube 1905 and the second hollow round tube 1906. The first hollow tube 1905 and the second hollow tube 1906 are evenly distributed with through water outlet holes, and the first hollow tube 1905 and the second hollow tube 1906 can be rotated to change the water outlet direction. A first plug 1907 is provided at the left end of the first hollow circular tube 1905; A second plug 1908 is provided at the right end of the second hollow circular tube 1906; The bottom of the main component 1901 is provided with a through hole 1909; The first filter box 8 and the second filter box 10 include a housing 801, and a handle 802 is fixedly installed on the top surface of the housing 801. The inner wall of the housing 801 is movably installed from top to bottom with a water distribution plate 803, a first filter cotton support plate 804, and a second filter cotton support plate 805, and all three have uniformly through-holes.

[0028] The first filter box 8 and the second filter box 10 also include an air inlet pipe 806 and an air vent 807. The air inlet pipe 806 is fixedly connected to the water distribution plate 803. The air vent 807 is opened through the front side wall of the housing 801 and is located between the first filter cotton support plate 804 and the second filter cotton support plate 805.

[0029] Working principle: During use, water flows through the first water inlet grille 201 and the second water inlet grille 202 into the space between the partition 2 and the first water-turning plate 5 and the space between the partition 2 and the second water-turning plate 6, respectively. Through the action of the first water-turning plate 5 and the second water-turning plate 6, the water will flow into the first filter box 8 and the second filter box 10. Water will flow downwards after passing through the water distribution plate 803, and then be filtered through the first filter cotton tray 804 and the second filter cotton tray 805 in sequence before flowing downwards, thus achieving multi-stage filtration of water and ensuring filtration effect. The filtered water will pass through the arc-shaped openings at the bottom of the first vertical plate 3 and the second vertical plate 4 respectively, and under the action of the first guide plate 13 and the second guide plate 14, it will flow to the top of the first filter cotton support plate 21 and the second filter cotton support plate 24 respectively. The water after secondary filtration will enter the area where the water pump 17 is located. After the water pump 17 is started, the filtered water will be transported through the water pipe 18 and discharged through the water outlet device 19, while the water is circulated. During cleaning, the handle 802 allows the filter box 8 to be removed, and the water distribution plate 803, the first filter cotton tray 804, and the second filter cotton tray 805 can be removed and cleaned in sequence. The contents not described in detail in this specification are existing technologies known to those skilled in the art.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A novel back-filtered aquarium, comprising a tank body (1), characterized in that: The cylinder body (1) is fixedly installed with a partition (2), and the partition (2) is provided with a first water inlet grille (201) and a second water inlet grille (202) through the upper and lower sides of the left and right ends. The upper middle part of the partition (2) is provided with a first water outlet (203). The cylinder body (1) has a first vertical plate (3) and a second vertical plate (4) fixedly installed on the inner walls of the left and right sides. The front sides of the first vertical plate (3) and the second vertical plate (4) are fixedly connected to the rear side of the partition (2). The bottom of the first vertical plate (3) and the vertical plate (4) is provided with an arc-shaped opening. A first water-turning plate (5) is fixedly installed on the left side of the first upright plate (3), and the bottom surface of the first water-turning plate (5) is fixedly connected to the inner bottom surface of the cylinder (1), and the first water-turning plate (5) is located on the rear side of the partition plate (2). A second water-turning plate (6) is fixedly installed on the right side of the second upright plate (4), and the bottom surface of the second water-turning plate (6) is fixedly connected to the inner bottom surface of the cylinder (1), and the second water-turning plate (6) is located on the rear side of the partition plate (2). The first bracket (7) is installed on the top surface of the first water-turning plate (5), and the rear side and left side of the first bracket (7) are fixedly connected to the left inner wall of the cylinder (1) and the left side of the first upright plate (3), respectively. The first filter box (8) is movably installed on the first bracket (7). The top surface of the second water-turning plate (6) is equipped with a second bracket (9), and the rear side and right side of the second bracket (9) are fixedly connected to the right inner wall of the cylinder (1) and the left side of the second vertical plate (4), respectively. The second bracket (9) is movably equipped with a second filter box (10). A third upright plate (11) is fixedly installed on the right side of the first upright plate (3). The rear side and bottom surface of the third upright plate (11) are fixedly connected to the rear inner wall surface and the inner bottom surface of the cylinder body (1), respectively. The third upright plate (11) is also fixedly connected to the rear side of the partition plate (2). A fourth upright plate (12) is fixedly installed on the left side of the second upright plate (4). The rear side and bottom surface of the fourth upright plate (12) are fixedly connected to the rear inner wall surface and inner bottom surface of the cylinder body (1), respectively. The fourth upright plate (12) is also fixedly connected to the rear side of the partition plate (2). The top surfaces of the third vertical plate (11) and the fourth vertical plate (12) are respectively equipped with a first guide plate (13) and a second guide plate (14). The rear side and front side of the first guide plate (13) and the second guide plate (14) are respectively fixedly connected to the rear inner wall of the cylinder (1) and the rear side of the partition (2). A fifth vertical plate (15) is fixedly installed on the right side of the third vertical plate (11). The rear side of the fifth vertical plate (15) is fixedly connected to the rear inner wall of the cylinder (1), and the fifth vertical plate (15) is fixedly connected to the rear side of the partition (2). The sixth upright plate (16) is fixedly installed on the left side of the fourth upright plate (12). The rear side of the sixth upright plate (16) is fixedly connected to the rear inner wall of the cylinder (1), and the sixth upright plate (16) is fixedly connected to the rear side of the partition plate (2).

2. The novel back-filtered aquarium according to claim 1, characterized in that, A water pump (17) is fixedly installed on the inner bottom surface of the cylinder (1), and the water pump (17) is located on the right side of the fifth vertical plate (15). The water outlet end of the water pump (17) is fixedly connected to the bottom end of the water pipe (18), and the top end of the water pipe (18) is fixedly connected to a water outlet device (19), which is connected to the first water outlet (203).

3. The novel back-filtered aquarium according to claim 1, characterized in that, A third bracket (20) is installed on the upper right side of the third upright plate (11) and the upper left side of the fifth upright plate (15). The front side, rear side, left side and right side of the third bracket (20) are respectively fixedly connected to the rear side of the partition plate (2), the rear inner wall of the cylinder (1), the right side of the third upright plate (11) and the left side of the fifth upright plate (15). The top of the third bracket (20) can hold the third filter cotton tray (21) or the first filter bag tray (22).

4. The novel back-filter aquarium according to claim 1, characterized in that, The upper left side of the fourth upright plate (12) and the upper right side of the sixth upright plate (16) are equipped with a fourth bracket (23), and the front side, rear side, left side and right side of the fourth bracket (23) are respectively fixedly connected to the rear side of the partition plate (2), the rear inner wall of the cylinder (1), the left side of the fourth upright plate (12) and the right side of the sixth upright plate (16); The fourth bracket (23) can be used to place a fourth filter cotton tray (24) or a second filter bag tray (25).

5. The novel back-filter aquarium according to claim 1, characterized in that, The second upright plate (4) has a multi-functional compartment (401) on its left side, and the multi-functional compartment is located on the right side of the fourth upright plate (12).

6. The novel back-filtered aquarium according to claim 2, characterized in that, The water outlet device (19) includes: a main pipe component (1901), which is a three-way pipe structure and is hollow. It includes a first port (1902), a second port (1903) and a third port (1904), and the central axes of the three ports intersect. The first port (1902) can be connected to the aquarium outlet pipe, and its inner wall is threaded; The second port (1903) and the third port (1904) are smooth interfaces that can be tightly connected to the first hollow round tube (1905) and the second hollow round tube (1906); The first hollow round tube (1905) and the second hollow round tube (1906) are evenly distributed with through water outlet holes, and the first hollow round tube (1905) and the second hollow round tube (1906) are rotatable to change the water outlet direction; The first hollow circular tube (1905) has a first plug (1907) at its left end. A second plug (1908) is provided at the right end of the second hollow circular tube (1906); The bottom of the main component (1901) is provided with a through hole (1909).

7. The novel back-filter aquarium according to claim 1, characterized in that, The first filter box (8) and the second filter box (10) include a housing (801), and a handle (802) is fixedly installed on the top surface of the housing (801). The inner wall of the housing (801) is movably installed from top to bottom with a water distribution plate (803), a first filter cotton support plate (804), and a second filter cotton support plate (805), and drain holes are uniformly opened on the water distribution plate (803), the first filter cotton support plate (804), and the second filter cotton support plate (805).

8. The novel back-filter aquarium according to claim 7, characterized in that, The first filter box (8) and the second filter box (10) further include an air inlet pipe (806) and a ventilation groove (807). The air inlet pipe (806) is fixedly disposed through the water distribution plate (803). The ventilation groove (807) is disposed through the front side wall of the housing (801) and is located between the first filter cotton support plate (804) and the second filter cotton support plate (805).

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