Morton Salt Professional's Choice Pool all natural salt is a premium salt that allows you to enjoy all the benefits of saltwater swimming pools. It's all natural formula proves gentler on hair, skin, and eyes—and is gentler on your swim wear. Plus, the granules dissolve in less than 3 minutes–allowing you to get back into that clean and refreshing water faster. Available in a 40-pound bag. The highly rated pool salt you can trust– from the salt experts.