Where we mention Clorox Pool & Spa Swimming Pool pH Down, 5 lb

• Weekly Pool Care: Your Maintenance Schedule and Checklist

  pH adjuster — lower · Best for: Lowering pH when it drifts above 7.8 during summer heat

• Why Your Pool Smells Like Chlorine (And How to Fix It)

  pH balancer if pH is above 7.8 · Best for: Sodium bisulfate that lowers pH so free chlorine becomes effective again; adjust before shocking

• Why Is My Pool Still Cloudy After Shocking?

  pH down before re-shock · Best for: Lowering pH to 7.2 to 7.4 before re-shocking if pH was above 7.8 (chlorine loses most of its punch above 7.8)