The water of 20 cm deep is suitable for raising some small fish, and it is necessary to raise more skinny varieties, and delicate fish often cannot live. There are good and bad fish farming in shallow water. Because there are few water bodies, the pressure is relatively small. If the water is too deep, the water pressure on the fish at the bottom will be too great, which will affect its health. However, lack of water can also lead to a decrease in dissolved oxygen, which is not a good thing for fish to breathe.
2. What kind of fish are raised in shallow water fish tanks1. Swordtail fish: Swordtail fish is a tropical fish, which is produced in Mexico and Guatemala. It has a mild temperament and is lively, and can be mixed with small fish. This kind of fish has miscellaneous feeding habits, is easy to raise, and can adapt to both weakly acidic water and weakly alkaline water.
2. Zebrafish: Although zebrafish is tropical fish, it is not afraid of cold. It is only 5 cm long and has many stripes. It looks like zebra. This kind of fish swims almost all day, which is very easy to raise, and can be mixed, and the requirements for water quality are not high.
3. Black Mary: Black Mary is a kind of Mary fish, a small ornamental fish cultivated artificially, with a body length of only 5-6 cm. This kind of fish prefers weak alkaline hard water, so it is not suitable for polyculture with other tropical fish. In addition, it also has the characteristics of eating algae, so it can also be used as tool fish.