The Planted Tank Forum - View Single Post - Drop checker fluid
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post #3 of (permalink) Old 10-01-2012, 05:38 PM
Planted Tank Guru
Join Date: Dec 2005
Location: Sacramento, CA
Posts: 21,015
You don't need extreme accuracy for a drop checker, so this method is adequate: Calibrating Test Kits - for non-Chemists

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