I am guessing I will.

I have a 90 gallon freshwater tank in the same room with halides on in and it gets up to 82-83 in the day unless I keep a strong fan on it. It is closed on the sides but open on the top and back. No glass lids between the lights and water.

To keep evaporation down, fish in and cat out, I plan on using the glass cover for the tank.