I bought a Crocea clam about 3 months ago with very bright colors. But in my tank I don't have the same colors. It seemed to lose it's bright colors after about a month. I'm dosing with tropic marin bio calcium around 400-450ppm. I have a Tek5 6x54 T5 the same fixture the clam was under in the store. I was told that the light would work. Perhaps I'm missing a suppliment?
here is a pic so you can see the discoloration.
