Where we mention Clorox Pool & Spa Swimming Pool pH Up, 4 lb

• Weekly Pool Care: Your Maintenance Schedule and Checklist

  pH adjuster — raise · Best for: Raising pH when it drops below 7.2 after acid or rain

• Pool pH: What It Is, How to Test It, and How to Raise or Lower It

  Standard pH increaser · Best for: Routine low-pH corrections