The invention discloses an in-situ
water treatment and
micronutrient slow release device for a
fresh water aquarium, and relates to the technical field of aquarium maintenance equipment. The device comprises a
probiotic microorganism attachment skeleton and a plurality of multi-layer slow-release
nutrition balls placed in the
probiotic microorganism attachment skeleton. The framework is composed of an upper biochemical filter bin and a lower slow release bin, the upper filter bin accounts for 4 / 5 of the volume, and the interior of the upper filter bin is of a dense
honeycomb structure so as to provide a huge
microorganism attachment surface area; the lower slow-release bin is of a drawable drawer structure, micropores are formed in all the faces except the top face of the lower slow-release bin, and the top face is closed to protect upper
flora. The multi-layer slow-release
nutrition ball adopts a layered tabletting and
coating process, comprises a microbial activation layer, a macroelement and
carbon source layer and a microelement and buffer layer from outside to inside, and can slowly release
nutrient substances in sequence. According to the
system, the functions of bacterium cultivation and nourishing are deeply integrated, automatic and stable maintenance of
water quality is achieved, and the
system is particularly suitable for opening of a
fresh water aquarium, regular maintenance and low-maintenance operation scenes.