This is the last of 8 filters in my reverse osmosis system including de-ion and fluoride with 60psi pressure regulator and flow restrictor and water is mostly neutral at 7.2ph. I will try another brand of filters as this is my second time buying this brand and I wasn't satisfied. I've just started adding less than a pinch of sodium carbonate per gallon of bottled water. The pH value is 7.6
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