Morton Salt F149800000G High Purity Water Softening Salt, 50 LbsMorton Solar Salt is crystallized by the sun and wind from natural salt brine held in open ponds. These high purity salt crystals are harvested, washed and kiln dried to remove remaining moisture. With no additives, its an excellent, natural choice for treating your hard water. Solar Salt is 99. 8% pure salt. Size: 50 lbs White cyrstal 99. 8% pure High purity salt crystals are harvested, washed and kiln dried to remove remaining moisture With no