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  1. B

    Hard water growing question

    Howdy y'all. New here but not a noob. I've got a question for anyone here familiar with growing in hard groundwater. I have my groundwater filtered down to .5 micron, and though the pH is in the high 7's when I add my nutrients the pH goes down to 6.5 or 6.4 and stays there (no rebound over 24...