I have a quick question about my live rock. My tank has been set up for about 4-5 months. Most of my live rock is turning green. My phospates are 0 as well as nitrates. I have a clean-up crew of snails crabs. I had a outbreak of hair algea which is coming to an end and I am wondering if the hair algea has stained the rock green. Will it ever change back to the color the rock was originally? I have a nitrate remover, Uv sterilizer and have done everything I can think of for this tank. I tested RO water at nitrates are 0. Any thoughts?