The Planted Tank Forum - View Single Post - ~Explanation of how a drop checker works~
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Old 05-09-2011, 03:37 AM   #6
Gatekeeper
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Another good article.

http://www.njagc.net/wp/co2-equipment/the-drop-checker/
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Last edited by Gatekeeper; 07-22-2014 at 01:49 AM.. Reason: Link broken
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