+1 for the controller! I have a ITC-308 you can calibrate it, set temoature differential of when it turns on and off. I set my heater just above the controller if the controller failers the heater doesn't stay on long.
Also this unit has a cooling funtion so I have a fan over my sump that plugs in also to help cool in the summer.
Also this unit has a cooling funtion so I have a fan over my sump that plugs in also to help cool in the summer.