Extended periods of high heat can def F up your corals.
Temp is something often over looked but can get out of control. I accidentally left my fan off on my MH and tank got to 83 before I noticed luckily no long term damage that I am aware of bnut could have been bad.
I keep my tank around 78-79
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Justin
Current Tank Info: 25G cube (finally back in the hobby in a small way)
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