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Old 01-04-2011, 07:59 PM   #1
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Default Using Vinegar to lower pH, but....

My 522 tank pH is 7.7 for the past few months after I washed the media in the sump was pH 6.5 before. Trying to use vinegar to lower it but found that after a few hours the pG will bounce back to 7.7 again, can any experts here can advice the right ways to lower pH by using vinegar?
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