So, I have done some reading and it seems like the best temp variation for a Pac is: Upper 70's during the day, and lower 70's during the night.

I have an Undertank Heater attatched to the side of my 10G Pacman tank. It is always a constant 70F in my ROOM where i have the tank.

How much does an Undertank heater heat up the cage??? I do not want to kill my Pacman or make him go into hibernation by letting it get too hot or too cold in his tank... Considering what i said above should i turn on my undertank heater at night or day or both?????

thanks