PETTIS Spa Calcium Hardness Increaser



PETTIS Spa Calcium Hardness Increaser raises calcium hardness levels of spa water very easy!

In stock


Total hardness should normally range between 175 to 225 ppm.

If indicated by a test kit, add 1oz for every 500 gallons to raise hardness by 10ppm

Turn pumps on with air knobs off. Let circulate for 24 hours and test again.

Test water weekly and add as needed and indicated by chart on back of container.

If desired hardness is lower than indicated hardness, please contact your local water care professional.

Formulated to work with most sanitizers

Raises total hardness of spa water and hot tub water