small fish tank can use a lot of filters, the best is also a back filter. The back filter is installed on the back of the fish tank, which will not affect its ornamental value, and the filtering space is sufficient, which can put a lot of filter materials, thus having a very positive effect on maintaining water quality. However, the installation of the back filter is somewhat troublesome, and can not paste wallpaper, but also has certain requirements for the specifications of the fish tank.
1. Upper filtration: Upper filtration is a common filtration device, which is generally placed on the fish tank. The installation is relatively simple. A submersible pump is placed in the water to pump the water into the filter tank for filtration, and then the water is discharged back into the fish tank. The filtering effect of the upper filter is general, and it will lead to uneven stress in the fish tank and affect the service life.
2. Side filter: The side filter is installed on one side of the fish tank, and the water in the overflow area will enter the filter tank and be discharged from the bottom after being filtered layer by layer. The filtering effect of side filter is good, but it will occupy a certain space in the fish tank, if it is a small fish tank, it will be troublesome to use.
3. Filter barrel: The filter barrel is external, usually placed outside. The water pump can suck water into the filter barrel, pass through the filter boxes layer by layer, and then return to the cylinder. Because the filter barrel is placed outside, the space in the cylinder is not occupied, and the installation and the cleaning are very convenient.
