Originally Posted by dalto
Ich stops reproducing at that temperature but in the 90's it actually dies. I haven't had Ich in a long time but in the past I had a couple of instances where treating at 86 for 10 days was not enough and it returned again after the temp was lowered.
Agreed, 86 has worked well for me. If going to raise to > 90 degrees OP, then be sure to increase aeration in the tank as warmer water has less oxygen. Provided your fish can handle higher degrees.