DougA Posted February 12, 2021 Report Share Posted February 12, 2021 I've drained and filled my hot tub twice. Both times it needed about 12 sodium bisulfate to bring down the Alk & PH. When I do a drain and fill, can I add that entire amount (12 OZ) at one time? Any tips? THanks, Doug Quote Link to comment Share on other sites More sharing options...
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