Check the listing for details. Sirona Spa Care Spa Down 2.5 lb. Condition: New. Listed at 17.99 USD. Sirona Spa Care Spa Down offers a safe and effective way to decrease pH levels in spa water. This granular balancer helps maintain a balanced pH, preventing equipment corrosion and scale formation. Compatible with various sanitizers, it ensures a safe and stable pH for your spa.Product Features:Spa Down is compatible with all sanitizers and ensures your spa water stays safe and healthThe pH decreaser for hot tub lowers pH and total alkalinity levels with the granular formula, so your sanitizer stays effectiveBalances spa water effectively, so you can experience clean, well-maintained resultsThe pH decreaser for hot tub will prevent scale, cloudiness and/or discolored spa water from occurring by keeping your spa water below 7.8Maintains sanitizer effectiveness for clean spa water and whole-self wellnessDirections:Sirona Spa Care Spa Down should be used as necessary when pH levels are above 7.8Make sure all equipment is turned offAdd 1/4 ounces (1-1/2 tsp.) for every 500 gallons of spa waterTurn the circulation system on for 30 minutesRe-test the water. If the pH is still above 7.8, repeat steps 1-3