Calcium Hardness Increaser


  • Prevents corrosion of equipment due to low calcium hardness
  • Prevents degradation of spa surfaces
  • 1 tbsp. per 100 gallons increases calcium hardness ~25 ppm
SKU: 42636BIO Categories: ,


Calcium Increaser is a granular calcium chloride that’s used to prevent corrosion of equipment and etching of plaster due to low calcium hardness in the spa water. 1 tablespoon of Calcium Increaser per 100 gallons will increase calcium hardness in the spa water 25 parts per million.

Directions For Use:

1. Apply appropriate amount of product. Broadcast into spa with the circulation system operating.

2. Do not pre-dissolve.

3. Brush up any granules that do not immediately dissolve.

4. Operate circulation system for 30 minutes after application.

Additional information

Weight 0.75 lbs
Dimensions 12 × 4 × 4 cm

12 OZ




There are no reviews yet.

Be the first to review “Calcium Hardness Increaser”

Your email address will not be published. Required fields are marked *