I have heard to keep a daytime temp of 80-85 and night 75-80. I have no problems keeping the day temps, but at night, the temps in my house usually are about 70. I closed the vent in my nelsons room and the temp usually goes down to 72. I have an under tank heater under my 20 gallon, but it gets way too hot when I use it and he stays far from it.

What do you guys keep your temps at summer and winter? At what temps are critical? Thanks for any advice.