LifeLine Calcium Hardness Increaser 4lb LifeLine Calcium Hardness Increaser 4lb is designed to raise the calcium hardness level in pool water to help prevent corrosion, etching, and surface damage on both plaster and vinyl pools. By maintaining proper calcium levels, it supports overall water balance and helps protect heaters, pumps, and other metal components from aggressive, under‑balanced water. Key features & benefits Protects pool surfaces by reducing the risk of etching, pitting, and vinyl liner wrinkling that can occur when calcium hardness is too low. Helps prevent corrosion of metal and plastic components such as ladders, heaters, and circulation equipment. Supports stable water balance as part of total water chemistry (alongside pH, alkalinity, and sanitizer), improving swimmer comfort and clarity. Easy-to-apply granules that are broadcast into the pool, dissolving to raise hardness without significantly impacting other parameters when dosed correctly. Use & dosing overview Purpose: Raise calcium hardness into the typical recommended range of about 200–400 ppm for most residential pools (check your pool pro’s or manufacturer’s guidelines). When to use: At spring opening, after large water additions, heavy rain dilution, or whenever test results show low calcium hardness. General approach: Always test first, calculate dosage based on pool volume, add in smaller increments, allow full circulation, then retest before adding more. LifeLine Calcium Hardness Increaser 4lb is a straightforward way to protect your pool surfaces and equipment while keeping water chemistry in a healthier, more balanced range.
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