Do they: add heat to a room that you would notice, noisey compared to the aquarium, what is the increased cost in your electrical bill($30 a month)? My 200 gal tank runs from 80 to 83 daily. I would like to get that down to 78. The room temperature is 78.
Or should I just add another fan, put up with the 83 degrees and save my money.
PS my wife can't chime in on this one.