My basement runs about 65 degrees. To keep things warm, I'm planning to put the primary and later the carboy in a plastic rope tub ($5 from WallyWorld); fill the tub with water and keep it heated with a submersible aquarium heater and circulated with a small fountain pump. Anyone have any experience using this method to keep things toasty? I read about this method somewhere along the line and supposedly it's much easier to hold an even temperature than using a brew belt, etc.