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  1. mafoo

    lower pH with vinegar

    My CRS tank's pH is still over 7 despite having colombo and 100% RO. I think the culprit is the landscape rock i had in it for a about 3 months when i first set up up a few years ago. Ive tried kapta leaves but its still over 7. I was wondering if distilled vinegar would be a safe option to...
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