Leslie's - Hardness Plus Calcium Hardness Increaser, 8 lbs

Keep your calcium hardness at proper levels at all times to help protect your pool, water, and pool equipment with Leslie's Hardness Plus. Leslie's Hardness Plus is used to raise calcium hardness in swimming pool water. Low calcium hardness causes pool water to become corrosive which can result in etched plaster, corrosion of pool equipment and fixtures or may cause metallic stains. The ideal range for calcium hardness in pool water is 200 to 400 ppm (parts per million).

The calcium hardness level in a pool does not increase rapidly, but it is good practice to check the calcium hardness every month. Adding 1.25 pounds of hardness plus to 10,000 gallons of water will raise the calcium hardness by 10 ppm. **The minimum level of Calcium Hardness is 150 ppm.

Signs of Low Calcium Hardness in Your Pool

• Metal Corrosion: When calcium levels are too low, the corrosive nature of soft water can cause it to go after the metals in your pool, including handrails, ladders and equipment.
• Concrete and Plaster Corrosion: As pool water becomes more corrosive, it attempts to balance itself by leaching calcium from plaster, concrete, grout, tiling, or other pool surfaces. This causes pitting and delaminating, which essentially means the corrosive pool water eats away at the structure of your pool.
• Foamy Water: Soft water increases the likelihood of issues with unsightly pool water foam.

AccuBlue In-Store Water Testing

Water testing and pool chemicals go hand in hand when balancing pool water. Leslie's makes it easy with in-store water testing that offers precise water testing and customized treatment plans. Take the guesswork out of balancing your pool water and stop by your local Leslie's pool store for a FREE AccuBlue Water Test, keeping your pool clean, safe, and beautiful. Find your closest Leslie's Pool Store today and stop by for your free pool water test!

AccuBlue Home Digital Pool Water Testing

Looking for an at-home digital water tester? Leslie's AccuBlue Home is the total solution for a healthy swimming pool. It all starts with the testing device, which employs Leslie's state-of-the-art water testing technology to give you comprehensive water chemistry results and recommendations in 60 seconds -- all from the comfort of your own home. It's the only at-home pool water test that precisely measures 10 aspects of water chemistry. Learn more: Leslie's AccuBlue Home.