coloring fading in goldfish

Question
Hi. I have 5 goldfish. Each are different types. One of the goldfish is a Black Moore. At first, the color of his skin was black. But now, his skin had faded and he is almost white. He is still swimming fine and eats properly. I had another goldfish that recently passed away. Maybe that has something to do with it. Do you know what is wrong with my goldfish?

Answer
Hi Isabel;

Make a 25% water change right away. Goldfish will fade if there is a water quality problem. It might just be a normal color change as the fish matures if it has been going on for a while. Give me a bit more info too just to be sure;

How long has the tank been set up?
What size tank is it?
How big are the fish?
What is the water temperature?
How often do you usually make water changes?

Let me know as soon as you can......

At Your Service;
Chris Robbins