The reasons why black goldfish fade:
1. Effect of light
If the fish tank is in a too bright environment for a long time, the black goldfish may fade due to light reflection, refraction, etc. Symptoms, you can replace it with a black fish tank.
2. Normal development
During the development process, black goldfish will transform into variegated goldfish due to the partial disappearance of pigment cells. This is a normal development phenomenon and there is no need to worry.
3. Malnutrition
If the black goldfish is not fed for a long time, it will also fade. You should feed it regularly and feed it more food containing carotene to maintain good color.
4. The water quality is too poor
If the water quality is too poor, bacterial growth will make the goldfish sick, resulting in a dull color. The water should be changed 1-2 times a week.
5. The water temperature is too high
If the water temperature is too high, it will also cause the goldfish to fade. The water temperature should be kept at 12 to 25 degrees.