I work in the industry and recently have been exposed to Magnapool. At first, i was very sceptical because it was a new product out there. I do not preach about products, only relying on customers to tell me the goods and the bads. Magnapool is very similar to a salt pool, yes it still produces chlorine, BUT the water quality is much different, it is softer, you don't have the "salt residue" and feel the need to shower when you get out of the pool. It is ALL ABOUT THE WATER. The minerals are $33/bag and you add as required. They are only available from Poolrite Plus Stores. Some of my customers say that they are more expensive than a traditional salt pool, however they would never go back to a salt pool. If you are on facebook, add Magnapool as a friend, and ask customers on there about their experience. There are a lot of pool shops and pool builders who bag the product, because Magnapool has specific criteria to supply the Magnapool system too. Perhaps google benefits of magnesium or this site is a good one http://health.learninginfo.org/benefits-of-magnesium.htm