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PH was 7.4 added 1 gallon M acid to 34,000 vinyl pool in attempt to lower TA. Currently have deck jets running to aerate pool LOTS of surface BUBBLES to raise PH to acceptable levels. Should I continue aeration or add Borax? I'm assuming 6.8 isn't too low and should be able to increase naturally...

New and Filled 2 weeks ago Northern Indiana Well Water Vinyl Pool 33,000 Gal Pentair VS 3HP pump 220v Pentair 125k Heat Pump Pentair 60D sand Filter I knew iron was going to be a problem However, this sand filter from my thoughts is trash. I've been filtering over the past 2 week none stop...