I run mine at 76.5, it does warm a bit in the summer to 77-78 with fan use. Euphellia, toadstool, montiopora, pocillipora, stylophora, acans, cyphastrea, and zoas all seem to grow. I have had difficulty with favias just disappearing (one from a bryopsis outbreak with an apex fail) and scoly has been temperamentual. 2 blastos seem to be growing but slowly. Hard to tell if the temp would make a difference.