Spa Alkalinity Increaser

Raises total alkalinity in spa/hot tub water

Natural Chemistry’s Spa Alkalinity Increaser is used to raise total alkalinity in spa water. Total alkalinity in spa water should be maintained between 80- 120ppm. As a result of the buffering effect of total alkalinity, pH, bather comfort, water balance, and clarity are more easily maintained.

  • Brings alkalinity level to ideal range
  • Helps maintain a balanced water chemistry


Directions for use:

Read the entire label before using.

  1. Test spa water for total alkalinity level.
  2. Compare test results to chart below to determine appropriate amount of product necessary to make adjustment.
  3. With spa circulating pump on high speed, add required amount directly into spa water. Continue circulating water a minimum of 20 minutes.

Dosage Chart
All values are in dry ounces

Spa Volume 20ppm 40ppm 80ppm 100ppm
200gal 1oz 2oz 4oz 5oz
400gal 2oz 4oz 8oz 10oz
800gal 4oz 8oz 16oz 20oz

NCI threaded safety cap = 1/2oz

NCI large over cap = 4 1/2oz

  Printable version