I didn't have any problems with the tanks inside since I have a heat pump in my new place (whew). Upstairs it got to roughly 85F when my thermometer said 101-102F outside, but I had all the tank lights off and all the tanks had aeration/filtration. My problems were with the outside mini-ponds/stock tanks. I was afraid my little pond with whiteclouds would really suffer, but that was in a shadier spot (and totally covered with duckweed & pistia. Betty Goetz _______________________________________________ GSAS-Member mailing list GSAS-Member@thekrib.com http://lists.thekrib.com/mailman/listinfo/gsas-member