The ideal pH of spa and hot tub water is between 7.2-7.6. If a test kit indicates a pH level less than 7.2, sprinkle 2-1/4 tsp. of this product into spa for every 500 gallons of spa water. Run circulation system for a minimum of 20-30 minutes after adding.

**If Total Alkalinity level is not in the proper range of 80ppm – 120ppm, use Alkalinity Boost to adjust level prior to adding pH Up.

Check pH weekly. Add 2-1/4 tsp for 500 gallons of water to maintain pH level of 7.2-7.6.

*If pH is above 7.6 please see PETTIS pH Down.*

This product is compatible with all sanitizing systems.

Increases pH in Spa and Hot Tub water.

Eliminates eye irritation, chlorine odor, and corrosion caused from low pH.