SureSoft Pool Salt is a high-purity salt specifically engineered for pools using chlorine generators, meeting the recommendations of leading generator manufacturers. The extra fine, quick dissolving crystals allow for easier mixing and the added stain fighter helps eliminate unsightly discoloration. You'll be happy to know that our Pool Salt contains neither YPS nor iodine and is NSF certified. SureSoft Pool Salt is an environmentally friendly salt that eliminates the need to handle hazardous chemical chlorine and is gentler on your eyes, skin and hair. It also reduces the maintenance associated with chlorine-based pools.  40lbs