Model # CB

Alternate Part #'s LZACB

Product Description

Raises water hardness level while preventing foaming and equipment corrosion. 


  • Increases water hardness
  • Helps prevent corrosion

As Needed :
One ounce raises the calcium hardness 7 ppm in 500 gallons of water.

  1. Determine amount of product to be added. The ideal hardness level is 150-400 ppm.
  2. Turn jets ON to circulate spa water.
  3. Pour required amount into the water.
  4. Run filter for 1 to 2 hours.
  5. Retest water to ensure proper level.
  6. Repeat steps 1-5 until proper level is obtained.

Use Leisure Time Spa & Hot Tub Test Strips to determine hardness level. Water low in calcium will etch plaster and corrode equipment

Chlorine, bromine, ozone and biguanide sanitizers.

By maintaining proper hardness levels, the life of the spa will be extended.

See more pool chemicals.

Product Specifications

32 oz.

?     Asked on 6/12/2017by Ralph F. Taylor

I have an electronic system for my pool by ECOSMART out of Minnapolis, MN. It ask for the calcium hardiness to be 400 ppm and above. Presently it is about 150 ppm. How much liquid Calcium Booster to I need to add to get it above 400 ppm? My pool size is 17'X35'X8'.

A  Answered on 8/5/2017 by InyoPools Product Specialist Alex V.

Ralph, For a pool, you would need a bucket of Calcium Hardness Increaser. There is a dosing chart on the product page.