The Planted Tank Forum - View Single Post - Heater makes popping sound
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post #3 of (permalink) Old 01-03-2013, 11:58 PM
No more Bow ties
mistergreen's Avatar
Join Date: Dec 2006
Location: Cincinnati
Posts: 15,523
Some will make a small click sound but not a loud popping noise.

The small click noise is probably the electrical relay turning on.

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