Texan's...break out your heaters it's dropping down to cold temps during the night and through the mornings. No need to let your fish turn into icicles. Recently found out one of my heaters wasn't working that good and checked the temp in the tank. 62...62 is room temp at the moment and I'm in San Antonio. put in my 10 gallon heater into the 2.5 tank and raised it up to 80 now. Things are looking chilly in this state.