FAC = 0
TAC = 0
CALC. HARDNESS 220
CYA = 30 (SO I ADDED CHEM TO RAISE IT ABOVE 30)
TOTAL ALK = 120
pH = 7.8
COPPER, IRON = 0
PHOSPHATES = 0
Why can't I maintain chlorine?? This never happens to me.
I use leslie's trichlor hockey pucks in an inline feeder - just like I’ve done for years and years. Pool is covered and heated. Only trace amounts of green algae. Taylor OT test kit reagents only a year old. Will use my powdered shock only as a last resort due to my commitment to make my new liner stay unbleached and supple. My area is northeast.

I/g vinyl; 28k gal.; 1.5 hp de filt