The Planted Tank Forum - View Single Post - insides of aquarium heaters?
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post #4 of (permalink) Old 11-13-2012, 05:48 AM
Planted Tank Enthusiast
Join Date: Sep 2012
Location: Denham Springs, La
Posts: 764
The strip consists of two strips of different metals which expand at different rates as they are heated, usually steel and copper, or in some cases brass instead of copper.
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