I’ve been struggling with this issue too tried chemi blue premium, chateo, and finally had success with phosguard but I had to add a huge amount I tested a week with chemi and no change from .90 then added phosgaurd on a Friday then Tuesday tested at .69 then again on Thursday around 6 o’clock down to .39 and no sitting at .13 hoping to come down a just a little more. I added a full cup which is about double the recommendation because mine were so high and I needed them down ASAP.
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