1. how to deal with

the overflow of the filter cotton at the bottom of the fish tank? Generally, there are two situations in which the filter cotton at the bottom of the fish tank is blocked. One is that the fish food is blocked, which means that too much feeding is needed to reduce the amount of feeding. In addition, you can also put a wave-making machine, which can break the fish food, so it is not easy to block. The other is sand blockage, which is also common. The way to deal with it is to lay thick filter cotton under the sand to prevent it from entering the filter tank.

Synthetic fiber: Synthetic fiber is a common filter cotton material. The filter made of it is not only soft in texture, but also dense. It can filter out most of the impurities, so it is also the preferred material.

2. Sponge: Sponge is also the material of filter cotton, but its function is generally to filter the dust in the air, not to put it in the filter box. Because it is easy to clean, it can be used repeatedly.

3. Biochemical cotton: The net of biochemical cotton is relatively large, so it can only filter out those large particles of impurities, and because of the large amount of water, it is also helpful for fish to spawn, and it can be used many times.

4. White cotton: The price of white cotton is relatively cheap, the texture is also very soft, the filtering effect is good, but it is more troublesome to clean, repeated use will lead to denaturation and rot, so it should be replaced regularly.