I live in the southwest where backyard swimming pools almost occupy everyones backyard. I personally have salt water pool that doesnt need cholorine to run. In a SHTF scenario and water became scare, I'd like to know how to make pool work for us. Does anyone know what kinda water filter I would need to make that pool water drinkable? What about making pool water from a chlorinated pool the same? Thanks so much for the help.