LF Inexpencive temp controller........

[lastlight]

Originally Posted by Dez

My wife is my free temp controller. She monitors the tank temp all day while she's home and if it goes above 80 degrees she turns the fan on. The heater is set at 79 degrees. If it goes above 82 degrees then she proceeds to turn the halides off and leaves the T5's on. You should try it sometime. It works great.

And obviously she's doing a pretty darn good job too! I'm not sure she can beat the check frequency of a controller but the built-in AI if there's an issue is much more advanced!