Since I've had my tank, I've purchased an green open brain and a white hairy mushroom with pink tips. Both had begun to turn brown. THe open brain eats well (cyclopeze, mysis shrimp, Rod's food) and only recently the mushroom has begun to accept cyclopeze. If I understand correctly this is a sign that the xoanthela are taking over as the primary food source? Is there anyway to get them back to original color?