I don't really know where mushrooms would fit in, corals or anemones. I have this mushroom that the store owner called a purple pimple. It was green and had purple pimple looking spots. it's starting to turn pale and white in the center. am I doing something wrong? I feed it and change the water regularly, I have MH and actinic lighting. help. I have also had problems with anemones, but before I got the new light. I'm confused.