The Planted Tank Forum - View Single Post - DIY External Heater (56k!)
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post #33 of (permalink) Old 10-05-2007, 04:46 PM
Planted Member
Join Date: Feb 2007
Location: NW Oregon
Posts: 292
Most heaters have a line marked on them that indicates minimum water height. The thermostat is typically just below this line. it that area's not in contact with the water, you're not going to get good regulation.
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