Rendézvous Spa Specialties Alkalinity Up is an granular additive that raises spa water alkalinity to prevent pH fluctuation.
It is a violation of Federal law to use this product in a manner inconsistent with its labeling.
1. To increase total alkalinity determine the level of total alkalinity. If the value is below 75 ppm, add sufficient Alkalinity Up directly to the water - to increase the total alkalinity value to at least 75 ppm. 2 1/2 tbs. will provide approximately 10 ppm increase in total alkalinity for 500 gallons of water.
2. Wait several hours for Alkalinity Up to distribute uniformly before rechecking total alkalinity level.
3. Repeat as necessary.