bicolor blenny

[primo21]

have a bicolor blenny, dark blue and orange, for about 6 months now. the orange on his tail has almost completely faded. he is otherwise apparently healthy and very active. he is eating pellets, frozen mysis, chopped shrimp and nori. anyone have an idea why he is losing color?

Params, Amm/Nitrite = 0, nitrate ~5, phos < 0.05, cal 450, alk 10, pH 8.1 sal 1.025, temp 78.

 

[eatbreakfast]

Try switching up it's diet. Also what other fish are in the tank? Sometimes having fish that it will want to defend it's territory from will help it's vibrant colors to return.