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  1. N

    low KH

    It's been a long long time since I took out my dusty test kits, but for one reason and another, I tested KH and GH today. While the GH is around 8-9, the KH is 0! :shock: pH is 6.5. Before I started using CO2 (currently just the Nutrafin kits) both KH and GH were quite high, and pH hovered...
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