What is the best filter for a small fish tank? What are the common filters?

There are many filters that can be used in small fish tanks, and the best filter is reverse filtration. The back filter is installed on the back of the fish tank, which will not affect its ornamental value, and there is enough filtering space to place a lot of filtering materials, thus playing a very positive role in maintaining water quality. However, the installation of the filter screen on the back is a bit troublesome, and wallpaper can't be attached, and there are certain requirements for the specifications of the fish tank. First of all, what is the best filter for a small fish tank? There are many filters that can be used in small fish tanks, and the best filter is reverse filtration. The back filter is installed on the back of the fish tank, which will not affect its ornamental value, and there is enough filtering space to place a lot of filtering materials, thus playing a very positive role in maintaining water quality. However, the installation of the filter screen on the back is a bit troublesome, and wallpaper can't be attached, and there are certain requirements for the specifications of the fish tank.

Second, what are the common filters? 1. Up-filtration: Up-filtration is a common filtration device, which is usually placed at the top of a fish tank. Installation is relatively simple. Put a submersible pump in the water, pump the water into the filter tank for filtration, and then discharge it back into the fish tank. The filtering effect of the upper filter is general, which will lead to uneven stress on the fish tank and affect its 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 pool 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 of the fish tank itself. If it is a small fish tank, it will be a little troublesome to use.

3. Filter bucket: The filter bucket is external and usually placed outdoors. The water pump can suck water into the filter barrel, pass through the filter box layer by layer, and then return to the cylinder. Because the filter barrel is placed outside, it will not occupy the space in the cylinder, and it is convenient to install and clean.