Ok so I got a zoo colony last week and it opened up in the first day. But now im seeing heads that are turning green and it looks like they are losing color. Im new to keeping corals soo please bare with me. My lighting right now i 2 10 k 65 watt bulbs over a 55 gallon tank cause my other 2 lights powered by a ballast went out. Also im not doseing my tank with any supplaments and i dont know what the calcium iodine or magnesium levels are but iam using reef crystals as my sea salt. The guy at my lfs told me that this coral is so hardy they really dont need good lighting or supplaments what do you think is causeing this lack of light water conditions or not doseing. Please help me cause im catching this really really early and im might be able to reverse it if the right advice is given.