The Planted Tank Forum - View Single Post - Disposable fluval CO2.. nervous.. what else do I need?
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post #13 of (permalink) Old 05-11-2019, 01:43 PM
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This calculator will tell you how low you need your PH to drop with co2 to achieve 30ppm.

You don't have to get 30ppm, if your worried about your fish, shoot for something less, like 20-25ppm. If your PH is 7.6 generally you need a 1 point drop to 6.6 If your PH is still 7.6 and 7.6-7.8 out of the tap then your not getting really any co2 at the moment.

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