Rendézvous™ Spa Specialties™ Alkalinity Up is a granular additive raises spa water alkalinity to prevent pH fluctuation.
Effective water balance control
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.
- Wait several hours for Alkalinity Up to distribute uniformly before rechecking total alkalinity level.
- Repeat as necessary.
After adding Alkalinity Up, wait several hours before rechecking total alkalinity level.
Chlorine, bromine, ozone and biguanide sanitizers.