Temp. is a big problem---Have you had a cyno outbreak yet? Cyno loves warm water. Anyway, we had the same temp. problems and used fans and ice in the
sump and all the other stuff, Then I said to hell with this and bought a chiller. After I hooked the chiller up my whole tank and inhabitants changed, coral grew faster, fish were more active, cyno completely disappeared and stuff really started sprouting on my
live rock - good stuff, not algae. The best part is all the bad stuff went away,
nitrates dropped to 0, phosphorus drooped to 0 and
ph went up to 8.4 also the chillers are quiet, ya don't even know they are running. I have mine set @ 77-degrees for my 125 gal. It goes on at 78.5 degrees and turns of at 76.8. AND my wife loves me again---LOL.
