I don't know how widespread its distribution is, but I bought a bag of AquaSalt LLC product from a Houston area (Katy) Ace Hardware, and assuming it remains available, it is my new salt. It's labeled Food Grade, and that may explain why it's very fine and dissolves rapidly. In fact, when I pour into the deeper end of the pool (5-6 feet) it never reaches the bottom. No brushing necessary, as it's just gone. The label further specifies it is just for chlorine generators and not for human consumption. I see the company is in Houston, so I don't know where else it's available. I don't remember what I paid, but it must have been reasonable...because reasonable is my price limit.