Hello all. My mom just bought a Intex 18 by 48 intex metal frame pool. she bought the saltwater system to go with it. we got it set up, level, and filled with water. just got the pump on and add and dissolved the salt. the instruction say to wait 24 hrs before we turn on the satwater system. my question is, what do we do next, and how long before we can swim in the pool? when should i start testing the water? is there any chemicals i should buy?