55 gallon 78 degrees
10 gallon (female bettas) 78
2.5 gallon (male betta) 75 degrees --his little heater is not adjustable but keeps things about 5 degrees above room temp
anywhere from 78 to 82ish with my cichlids and about 72-75 with my other tank it dosnt have a heater yet but the lights are incandesent and seem to keep the tank pretty warm just a little cooler at night