Some good ideas there thanks man.
At the moment they on permanently because my living room is coldish during the day and rather freezing at night.
I do have a timer but its disconnected at the moment.
Would this work fine as well?
Heating pad under the tank, heating half the tank (currently setup like this) with a timer to heat the tank with 30 minute intervals. 40 minutes on, 30 minutes off. I am getting some thermos so to measure the temps in the tanks but the budget is taking a little hit at the moment
Alot of people say heating half the tank from underneath is a good way to keep them because the T will just move around if too hot and find a cooler or at least the right area with the temp.