Black Ranchu

[GreyMan]

Hi, I have a black Ranchu and it is changing it colour to bronze. Are there any ways to keep its black colour. Thanks.

[benny]

Usually fishes change colors due to water condition or diet, other than environment factors such as stress.

Any further details to help us get an idea what the cause is?

Cheers,

[GreyMan]

Hi, thanks for the reply. I was told that black in goldfish (in this case it is Ranchu) is unstable. I was wondering if there is anything to help stop this from happening, example, does the fish need plenty of lighting or high protein food.