Just bought a house and inherited my first pool. Pool was built in 94 and to my knowledge owner has been using tri-chlor tablets since day one. The first tests I conducted was FC (41ppm) and pH (5.18) and I knew CYA was through the roof. I added Borax right away to raise pH until I could get my test kit. Yesterday I drained approximately 5k gallons to bring CYA down and refilled with soft water. Tests today were:
I'm trying to get a fresh start so I can do this right. Should I keep attacking the high CYA first and drain more water before adjusting anything else?