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 desktop aquarium device with enhanced water filtration is provided. The aquarium device contains a base and a spherical tank. A filtering dish is installed inside the base. The filtering device provides a winding pathway for water to flow through. Along the pathway, biological filtering balls are placed. An air pump is also fixedly installed inside the base. The base is closed from the bottom by a bottom cover. The tank is locked to the base and the tank provides an aquatic environment. Inside the tank, there are a filtering device and a water outlet. Through the water filtration provided by the biological filtering balls along the water pathway inside the filtering dish, the water in the tank requires less frequent replacement, making the aquatic cultivation simpler and more convenient.

Abstract: An aquarium filter to increase dissolved oxygen and improve water quality comprised of a box containing a segregated water inlet tank, a water collection tank, and multiple filtration tanks; water introduced into the water inlet tank being pumped by a submerged motor and mixed with air introduced from the ambient to be flushed to the water collection tank; the water being bumped against bio-filtration balls in filtration tank for the beneficial microbes to get attached to the filtration balls to consume hazardous microbes.

Abstract: An aquaculture water quality ecology system to improve water quality in an aquaculture pond by guiding water into a physical filtration tank at the top of the system, then flow into a sedimentation tank to rid of algae, pathogenic bacteria, and parasites before being dripped down to a separately provided ecology process tank containing bio-filtration balls; drops being broken into even smaller drops by the filtration balls; air blower on one side and an exhaustion pipe on the other side to blow away hazardous gases to the ambient leaving the clean water after the final filtration to flow into the aquaculture pond.