+1 on the portable air conditioner... paired with a fan blowing across the tank or sump, and both you and the tank should be comfortable. They are expensive but awesome.
Or, consider turning your heaters up so the night time temperature drop isn't so major... if the tank wants to be consistently 83F, let it but don't let it drop at night. Coral reefs are commonly 85F around the tropics, it won't hurt the corals or fish (increases metabolism though, which means more bioload) but a fluctuating temperature will.
__________________
Calvin
---
Planning a 29 gallon mixed reef...
|