How many colorful immortals can a 1㎡ fish tank raise?

According to the size of the fish tank, the fish tank of 1 m2 can hold about 300 liters of water. Considering the individual size and water quality requirements of colorful immortals, each colorful fairy needs at least 20 liters of water. Therefore, a 1 m2 aquarium can only support 15 colorful immortals at most. At the same time, we should pay attention to control the number of fish, keep the water clean, and avoid the accumulation of excrement caused by too many fish, which will affect the health and growth of fish. In addition, properly configuring filters and changing water regularly are also important links in fish tank management.