you can add the baking soda right now. Start with 1 pound, and wait 6-24 hours, test and add more as needed. May help your pH rise a little, too. Or you could use washing soda (soda ash) to raise both at once.
Re: How long to get Borax PH increase test results?
you can add the baking soda right now. Start with 1 pound, and wait 6-24 hours, test and add more as needed. May help your pH rise a little, too. Or you could use washing soda (soda ash) to raise both at once.
Carl
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