5 Things to Know About Adding Calcium Chloride to Your Pool

Test your water first Most pools need 200–400 ppm calcium hardness. If you are below 150 ppm, add calcium chloride. If you are only slightly low, skip it unless you have a plaster pool or an old liner.

Use pool-grade calcium chloride, not road salt Pool-grade calcium chloride is the standard fix. Road salt contains impurities that can damage your pool.

Dissolve it in a bucket of water before adding Pour the dissolved mixture around the pool edges while the pump runs. Do not dump it in one spot, or it can cloud the water or stain surfaces.

Follow the dosage on the bag Dosage depends on your pool size and current hardness level. Do not guess.

Do not use calcium hypochlorite unless you also need chlorine Calcium hypochlorite is pool shock, not a hardness increaser. Use it only if you need to raise chlorine levels at the same time.