I can not maintain chlorine level - I slammed pool as directed by pool math. I put new liner in this year and had filled by “pool water” truck - about 20,000 gallons. I use TF kit and following are readings this morning: No Chlorine( added 8 gallons last night), CH=200, TA =220, I get no reading on CYA which I think might be culprit( I can afford to drain and fill again). K1000 kit shows no Chlorine and PH at 7.2 I’m at a loss. Water is crystal clear for now. HELP GANG!!!