I have several different kinds of corals all which boasted many different colours when I bought them. Since putting them in my aquarium, I have noticed that they all changed colour and now look the same pink/beige fleshy colour. I've attached a picture of my aquarium. It includes various different types of soft coral: elegance, gonipora, zoanth, polyps, mushroom, trumpet. Is this an issue with my aquarium lighting or water conditions? I have tested the water and it looks within spec. My tank is 29 gallon eclipse with two 18 watt lights (T8)? Any suggestions?