1、 Upper filtration

The upper filter is a common filter. It is generally placed on the upper part of the Aquarium. The water is pumped from the tank to the upper filter tank by a Submersible pump, and then the water flows through the filter cotton, biochemical cotton and various filter materials, and then returns to the tank from the outlet pipe. Its structure is simple and easy to clean, but it occupies the upper space and affects the overall aesthetics.

2、 Bottom filtration

The bottom filter generally refers to the bottom cylinder filter, which is located at the bottom of the Aquarium and is a large filter tank. It is connected with the master cylinder through pipes, and the pump provides power to complete the water circulation. Due to its large space, the perfect combination of various filters plays a very good role in maintaining the stability of water quality.

3、 Filter barrel

A filter barrel is a closed filtration form with several layers inside, each layer containing aluminum material. After the water flows through each filter material, it completes the cyclic filtration. It has a small footprint and relatively low noise, but the physical filtering effect is not very good, and cleaning is also very troublesome.

4、 Water Demon

The water goblin is a built-in filter in the Aquarium, also known as the sponge filter. It is driven by an air pump, and can suck out excrement and residual bait in the water. It can carry out biological filtration in a small space. For a small fish tank, it's very good, but a larger fish tank is not enough and can only serve as an auxiliary filter.