Heating pad

[Elliot]

I have a 10-gallon, moving up to 20- or 29-gallon. My heating pad is a small one, probably about 4"x6". Is that enough? I should probably upgrade that as well, right?

I believe that I have a 4x6 heat pad under my 20 gallon long, so you might be just fine. Like James said, it really depends on the ambient air temperature.