Temp/Humidity controller

[C.Mydas]

Hi! Im a newb and just acquired a 20g viv. No frogs...yet...lol.

We use a greenhouse temp/humidity controller in our fish room (reef tank) and was wondering if someone has a similar controller but smaller in size? The goal would be to turn on and off 3 computer fans in the lid of the viv according to humidity and temp...

Thanks in advance!
-Christina