There are some white things on my parrot's cheeks.

Hehe, this should be water mold, commonly known as white disease. Generally speaking, your water temperature is unstable. You can buy heating rods to keep the temperature constant. Try to use medicine-it is best to use gentamicin, or yellow powder or salt. They can diminish inflammation and cure diseases of your fish. And it is best to change the water around 1 after 2 or 3 days.

The color problem of fish itself is that the temperature difference of water is large-for example, it turns white from cold to hot, or it is always cold. For example, earthworms or Daphnia usually turn white when they eat water. If possible, feed some shrimp, mosquito larvae and so on.

Hehe, you care so much about your little fish ~ ~ ~

I wish you happiness, happiness and all the best! ! !