I am about to purchase my 1st AG pool (24' round) from The Pool Factory. I want to use salt water in it and the salesman is suggesting the "Saltwater 8000" pool. Is it necessary to purchase the "Saltwater 8000" pool when using saltwater or can I purchase a regular AG pool and use saltwater in it? (ex. regular 24' round pool "Quest") I have friends who have regular AG pools that they converted to saltwater and when purchased new weren't designed as saltwater pools. Thanks for any advice.