The Planted Tank Forum - View Single Post - Is this iron deficiency?
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post #13 of (permalink) Old 11-17-2012, 07:49 AM Thread Starter
Algae Grower
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Originally Posted by Darkblade48 View Post
The best way to check CO2 levels is to use a drop checker with a 4 dkH reference solution.
I use JBL DC, it stays the same green regardless of how much co2 I use
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