I bought a couple pieces of LR which came with some mushroom, red mushrooms I think they're called. I only have a PC with 2/65W bulbs. They seem to be doing OK, all but one which looks kind of sick. I stuck the rock at the top so the mushrooms would receive as much light I had in my 75gal tank. I add an additive to my water once in awhile, REEF VITAL DNA which says its good for inverts and Mushrooms. Anyone know something better???