What is a good heater to use on the 12G Nano cube? I want one that is easy to maintain at a certain temp and not one that I have to keep twisting the knob and guess each time. I probably only need a 50 watt, right? I did purchase one that has 2 settings 76 for f/w and 82 for s/w, but I am not sure that this one will actually do the trick.
