I have maintained a FOWLR tank for over 5 years and in the past 10 months have started my first reef system. I have started with the easy corals (mostly leathers, zoos, and mushrooms). For some reason I cannot seem to keep my mushrooms happy. With the exception of a single specimen I bought at a frag swap, every mushroom rock that I have bought from my lfs fails to fully open. They open up to about 1/3 to 1/2 the size they were in the store. All water parameters are good, they are kept in low to moderate flow areas, and at the bottom of the tank. My question is are they sensitive to higher temperatures because I am near 80 degrees. Everything else is doing very well in the tank. Mushrooms are supposed to be easy. I must be missing something.