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Re: [APD] CO2 and pH control
Thanks for the info Jerry. My KH and GH both measure 9.0. From your
info, it sounds like my current level of 8.2 is about right.
Jerry Baker wrote:
>Gordon and Susan Watkins wrote:
>>What I'm wondering is if I'm beating my head against the wall to use CO2
>>to lower my pH or do I need an RO/DI filter for my makeup water.
>The pH doesn't matter directly. What counts is the TDS, or KH of your
>water. When books and people say, "this fish prefers low pH," they
>really mean that the fish likes low TDS water (which usually has a low
>pH). You *really* need R/O if your water has such high KH that it's
>equilibrium is 9.2. If that's really what it is, your minimum pH from
>CO2 injection should be 8.3. Any lower than that and you're going to
>risk losing fish (that's 40 mg/L).
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