Skip to content

Spa Pure Hardness Increaser 16 oz. Dry - C002729-CS20B6

SKU HAV-50-9056
in stock, ready to be shipped
Save 55% Save 55%
Original price $19.99
Original price $19.99 - Original price $19.99
Original price $19.99
Current price $9.00
$9.00 - $9.00
Current price $9.00

Questions? Contact a Pool Professional Now!

Chat with us | Text us | Email us

Product Description

Low calcium hardness can corrode the heater and damage the spa surface, and also can contribute to excessive foaming. High calcium hardness can cause scale buildup and cloudy water. High water temperature of a spa makes it more difficult for calcium to stay in solution, so it is recommended to use Stain and Scale Preventer weekly to prevent scale buildup.

If you are adding soft water to your hot tub replace the calcium as soon as possible. Water Softeners take the calcium from the water and can cause equipment damage and corrosion.


  • Helps maintain Calcium Hardness levels between 150-300 ppm.
  • Helps prevent foaming and equipment corrosion.
  • Promotes better water balance.
  • Compatible with all sanitizers.


  • Brand: Spa Pure
  • Item: Hardness Increaser
  • Container Size: 16 oz.
  • Product Type: Balancers
  • Chemical Composition: 1 - 5% POTASSIUM CHLORIDE
  • Color: White
  • Form: Flakes
  • Odor: Odorless
  • Solubility: Readily Soluble