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Lowers pH

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.

Compatible With:
Chlorine, bromine and biguanide sanitizers.

Use as part of the Simple Spa Care® Program


Fast Gloss, 1 Pint


Filter Cartridge Cleaner 1 Quart

Calcium Boost 1 Quart

Availability: Out of stock

  • Free Shipping in the 48 States.
    Price includes UPS Ground shipping on orders over $60.00.

    $9.00 fee on smaller orders.

    Available in the 48 US States.

Order Online

or Call: (866) 595-6333