dummie question about a heater

[tmkx3]

okay, I am moving my 125g tank ( putting in new floors ). I will be putting my three fish in a rubbermaid tub with liverock and a powerhead for about 3 or 4 days. I have a heater for the 125g. I can use it in the 20g tub right? For some reason I was thinking I was gonna have to buy a heater for a 20g. The big heater won't over heat the water. It regulates itself right? Oh and while I am at it what is the best way to clean sedament off the heater

[findad]

the one have will be fine, just monitor your temp for a while

[iDream]

yeah just watch it, and i guess a good scrubbin would be okay, idk what kind of sediment you mean though

[0o.Kelsey.o0]

I'd soak the heater in some vinegar so loosen up any gunk that has hardened on. Just rinse it well before returning it to the tank (or tub).