Right now, I have a UTH for a 10 gallon on the side of the RETF tank. It is sufficient with the warm temps we've had, and I've even had to turn it off some days. During the fall, before the heat is turned on, the house can drop to 60 degrees at night. What would be the best way to heat? Is a UTH good? Then what size though? They are in a 20H currently. What kind of thermostat works best? I'm assuming with the up and down weather we get, I'll need one of those.