I know ideally we want to keep it around 76-78. I was noticing today, since I have been with it all day that my temp was hovering around 79-80. Is this too hot and if not what is the point where you go, I need a chiller?
Mine stays at 77 at night and gets up to 77.5 at the hottest during the day. I run a chiller of course. I think that stability is key. Even if you have it at 83. As long as the temp does swing much throughout the day. Your coral won't mind.