Originally Posted by bkiggy
It is very hot in Massachusetts right now and tank heaters are off. Tank water is 88 matching house temp. I AM putting on AC
but until then is it ok to do PWC
with COOL water ???
I'd have a fan pointing directly at the tank and add an HOB
(hang on back) filter too. Oxygen doesn't mix well with warmer water, so you need more aeration. 88 degrees is really too warm for your fish. 83 to 84 is the maximum. Tank water is very tolerable in the 76 to 80 degree range for most fish I've kept. Aquatic plants don't tolerate real warm water very well either.
Your new water can be a few degrees cooler, but no more than 4 or 5 degrees. The new water should be fairly close to that in the tank. I keep pretty hardy fish, so they don't mind if the new water is a bit different temperature.
I've learned water keeping isn't an exact science. There are always alternatives and conflicting opinions.