so we bought the intex 18' round pool last year and the pump that came with it did nothing! my yard is also extremely sunny so the pool ate chlorine like crazy, i need to replace the pump this year so i want to also switch to saltwater and cross my fingers that i dont have the issues i did last year. Im so confused on the type of pump i need and which ones come with the salt water and which ones have a seperate system and also which size filter i actually need to get, and any extras i have to buy along with it, any advice would be appreciated! thanks!