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Old 01-10-10, 11:33 PM   #3
Ryland
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Join Date: Mar 2009
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I would worry a little about residue on the heating element building up, but that might not be a problem.
You could also get a heating pad for an automotive oil pan and stick it to the underside of your tub of it's metal then insulate around the underside with reflective insulation.
Some people also build insulated covers to help keep the water warm.
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