Abstract: The aquarium creates a smooth circulation of water flowing through mechanical, biological, and chemical filtration mechanisms. The three filtration mechanisms are housed in a vertical first compartment and a vertical second compartment, both along a back side of the aquarium body, and a lateral third compartment along a bottom side of the body, respectively. A water pump draws water from the third compartment into the second compartment. After a first filtration processes, the water is poured back into the body. Due to the suction of the water pump, water flows from the body into the second compartment to undergo a second filtration process and then enters the third compartment, where a third filtration process is conducted. The water is finally drawn into the second compartment to complete the circulation.

Abstract: The aquarium creates a smooth circulation of water flowing through mechanical, biological, and chemical filtration mechanisms. The three filtration mechanisms are housed in a vertical first compartment and a vertical second compartment, both along a back side of the aquarium body, and a lateral third compartment along a bottom side of the body, respectively. A water pump draws water from the third compartment into the second compartment. After a first filtration processes, the water is poured back into the body. Due to the suction of the water pump, water flows from the body into the second compartment to undergo a second filtration process and then enters the third compartment, where a third filtration process is conducted. The water is finally drawn into the second compartment to complete the circulation.

Abstract: A multi-layer aerating filter comprises a plurality of pan-like containers being sealed and arranged in a stack and disposed within a casing. Each container has at least a water level pipe and a plurality of apertures on the bottom thereof. A plurality of infiltration spheres are disposed on the inner surface of the bottom of each container. A water inlet pipe and a blow-off pipe pass through the top of the casing and penetrate into the uppermost container. An air supply pipe passes through the casing and penetrates into the lowest container. A water discharge pipe is installed at the side of the casing near the bottom thereof. Aquarium water flowed into the containers via the water inlet pipe is aerated by the air charged into the containers via the air supply pipe to increase dissolved oxygen content and to facilitate the attachment of nitrifying bacteria on the infiltration spheres and cultivation of active sludge.