[book_em_danio]

Originally Posted by Durbkat

Like Christine said 80F is a good temp for bettas but it isn't for the goldfish, as long as you have a thermometer in that tank I'd take a ziplock bag and put a few cubes of ice in it then seal the bag up and float the bag in the tank and then check the temp every few minutes and once it gets down into the low 70's, 72F or lower then remove the ice and just have a fan blowing on the tank after you remove the ice to keep the temp down.

This is not a good idea! Water near the ice might be 50 degrees or less. This will certainly stress and kill your fish!