Aqua Salt is a premium salt designed specifically for salt water pools and spas. America's best swimming pool salt! 100% produced using the Evaporated Food Grade Salt Process in the two newest and most technologically advanced salt plants in the U.S.A. Highest purity salt possible - so pure it is used in the pharmaceutical industry and is certified as USP Grade. Packaged in a recyclable polyethylene film bag with a built-in soft handle. Intended for pools with a chlorine generator or salt water sanitizing systems. Aqua salt should be distributed over the greatest water surface area possible to result in the fastest dissolve rate. Brush as necessary until fully dissolved. Shipped in 40 lb bags. Pallet Quantities will ship via Express freight, with Residential Delivery and Liftgate Service Included. *** AquaSalt has recently changed the styling of their bags. "Food Quality" is no longer displayed on the AquaSalt bags. However, AquaSalt remains the premium choice for salt pools & is engineered specifically for use with salt chlorine generators.