SPAPURE HARDNESS INCREASER (DRY) 16 OZ

HARDNESS INCREASER IS A GRANULAR CHEMICAL DESIGNED TO SAFELY RAISE THE CALCIUM LEVELS IN SPAS. MAINTAINING AN IDEAL HARDNESS RANGE OF 150-300 PPM IS ESSENTIAL TO PREVENT "SOFT WATER" FROM BECOMING CORROSIVE AND DAMAGING SPA COMPONENTS. THIS FAST DISSOLVING FORMULA WORKS WITH ALL SANITIZER SYSTEMS INCLUDING CHLORINE, BROMINE, MINERALS, AND BIGUANIDE.