temperature question

[bboy aqua]

what is the most highest temperature that corals can live in?
the room my tank is in can get up to 90 degrees and so can my tank
with my nano chiller my tank stays at 83 degrees
is that too hot?
theres nothing in my tank but LR and sand
still cycling
I dont want to make a mistake

 

[Dubbin1]

83° is pushing it but if you don't have more then a couple degree swing it should be ok.