Francine- They can take the heat for several days, even a week, as long as the water quality is maintained, and there is a strong current at the surface to keep the O2 levels up. Some species will put up with it for almost ever, as long as O2 levels are maintained. My AC hasn't worked the whole time I've been in this house, over 2 years now. Only when I get lazy do I lose fish. Do serious tank maintenance, crank up the airstones/filters, open the windows in the evening, close them in the morning, and wait it out. Bob Dixon Leaving in the morning. ------------------------------------------------------------------------- This is the apistogramma mailing list, apisto@listbox.com. For instructions on how to subscribe or unsubscribe or get help, email apisto-request@listbox.com. Search http://altavista.digital.com for "Apistogramma Mailing List Archives"!