Old fish means that the fish stayed in the store for a long time and didn't feed it well for a long time, which made the fish stop growing bones in order to survive and save energy. This kind of fish can't be bought back at home, so it is called old fish in the industry.

The colorful angelfish has no color in the seedling stage, and the coat color means that it begins to change color after growing to 4-5cm, and gradually shows the body color of the parent fish. For example, the red colorful fish generally has no color before 3cm, and its coat color is a little bit; If you want your hair to grow faster, you can feed more hamburgers to help you. Generally, you can eat red nematodes, red worms and fast-growing colors.

Extended data:

habitat

Suitable water temperature: 26 ~ 32℃.

Water quality requirements: total hardness (GH): 3 ~ 6 dgh, pH: 6.5 ~ 7.0.

Angel fish are not docile, have strong territorial consciousness and have no special requirements for water quality. It is best not to mix with small fish. It is necessary to pay attention to the tiger skin fish of Cyprinidae. This naughty and lively fish often likes to bite the hip fin and tail fin of angel fish. Although it is not a fatal attack, in order to maintain the beautiful appearance of angel fish, it is better to avoid mixing.

Baidu Encyclopedia-Angelfish (Perciformes)