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...didn't seem to want to be on the algae. Took a sample from a patch of algae and looked at it with a microscope. Small cell amphidinium Dinos. #@!%!!!! I had been testing nitrate and phosphate and they had been staying in a good range since setup. Broke out a UV sterilizer and scrubbed the...

#@!% no. My SPS tanks hit 85f or more doing the summer days and they dont care. They run 78F now. They can get warmer than that in a shallow tidal reef on the equator. Some LPS on the other hand doesn't care for high temp swings because many LPS come from deeper water.