Just bought a 24 ft above ground - which gets installed Tuesday (weather permitting). We used to have a cheapy Intex 22 ft pool and it slowly fell apart. We ran it both with chlorine and with dilute saltwater and had no problems with chemistry.....just the physical aspects of the pool.
But after a couple of years of using indicator test strips, I just bought a good Taylor test kit (I'm a Chemical Eng. and should have done this a while back).
We had a 21 ft solar cover which I hope will work OK on a 24 ft pool