Hi, I bought neon green regular mushrooms and put them towards the top of my tank that has 4 T5HO bulbs. Within a month the mushrooms started to become brown. I move them lower and they continued to brown. I put them under a shaded rock, and they became less brown, but not nearly as neon green as when I purchased them. I just moved them into another tank with minimal lighting and they are totally brown. What causes mushrooms to become brown and what lighting do mushrooms corals prefer? Thank you.