The Planted Tank Forum - View Single Post - ~Explanation of how a drop checker works~
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Old 05-09-2011, 04:29 AM   #8
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Hold on scape, 6.6 should be the pH of the drop checker. Any number of things could affect the pH of the water. If you are using a controller, you should be focused on the pH drop between CO2-on, and CO2-off. Reference the red and blue highlighted lines.

Very good points to add, everyone!

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