Guides
How to lower pool pH: step-by-step with pH decreaser
Use pH decreaser (sodium bisulfate) to lower your pool pH. Add 10 grams per 10,000 litres dissolved in water to lower pH by 0.1. Wait 4 hours and retest.
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Use pH increaser (sodium carbonate / soda ash) to raise your pool pH. Add 10 grams per 10,000 litres dissolved in water to raise pH by approximately 0.1. Wait 4 hours and retest.
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