The Planted Tank Forum - View Single Post - not enough co2 or too much light or ferts unbalanced?
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post #5 of (permalink) Old 03-27-2015, 01:20 AM
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I use an API PO4 kit, I think it is fine, but the colour chart is rubbish, different hues completely to what I see in the tube - definitely needs calibration/comparison with known concentration solutions.
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