5Lb Water Hardness/Calcium Plus
Protects Surfaces
Granular Formula
Prevents Corrosion
Easy to Dose
This product increases the calcium hardness level in your pool water to help achieve a proper chemical balance. Use it whenever your water test indicates calcium levels are below the recommended range of 200–400 ppm.
Why You'll Love It
- Protects Equipment — Helping maintain proper calcium levels reduces the risk of soft water corroding your pump, filter, and heater.
- Preserves Finishes — Proper hardness helps prevent water from leaching minerals out of plaster, grout, and stone surfaces.
- Extends Liner Life — Maintaining balanced water helps prevent vinyl liners from becoming brittle or losing elasticity over time.
- Improves Stability — Balanced calcium levels make it easier to maintain a steady pH and total alkalinity.
Best For
- New pool fill-ups with soft water
- Plaster and concrete pool surfaces
- Maintaining levels between 200–400 ppm
- Areas with low-mineral tap water
How to Use
- Test water to determine current calcium hardness level.
- Calculate the dosage based on label instructions for your pool size.
- With the pump running, broadcast the granules into the deep end.
- Allow water to circulate for at least 6 hours before re-testing.
Pro Tip
Always add calcium in stages if a large adjustment is needed, and never add it to the pool at the same time as pH increaser or alkalinity up to avoid cloudy water.
Always follow label directions. Test and balance water chemistry before and after treatment. Keep chemicals stored sealed, cool, and dry.
