better to raise in a 40-centimeter bare tank? If the tank is small and there is no other equipment, you need to raise some fish that are more solid or more adaptable to the environment. The common ones are koi, goldfish, medaka, moonlight fish, scavenger fish and so on. However, koi and goldfish are relatively large when they grow up, so they can only raise some young koi and goldfish. For example, medaka, moonlight fish and scavenger fish can be raised in small tanks for a long time, because they do not require high water temperature and quality, and they are not big when they grow up, so they are suitable for raising in small tanks all the time. Moreover, the scavenger fish also has the function of cleaning up the garbage in the fish tank, which is more suitable for raising in the bare tank.
a bare tank? The difficulty of raising a bare tank is that it is impossible to control the water temperature and quality, so it is better to put the tank indoors in a ventilated place, which can not only ensure that the temperature difference is not too large, but also allow the fish to have enough oxygen. When the temperature difference is large in spring and autumn, the breeder needs to wrap insulation cotton around the fish tank to avoid the temperature difference affecting the life of the fish.
In addition, bare tank fish farming needs to change water frequently, because the water quality is easy to deteriorate without filtration. If the fish tank is large, the water quality will deteriorate slowly. If the fish tank is small, the water quality will deteriorate very quickly. If conditions permit, the breeder can change the water every 2-3 days.
Finally, pay attention to feeding, do not feed too much to the fish, if there are food residues in the fish tank, need to be fished out as soon as possible to avoid polluting the water quality
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