Does it matter if csi is -.5 or -.2 or 0.0 with a high CH of 550ppm I think it is better with a slight negative value to keep calcium from forming on pool surfaces, true or false? Pool math
States -.6 to +.6 is satisfactory.
TF-1000 test kit. Using Liq. Chlorine and pool math.
CYA 80 to 90
Water temp 48F
15,000 gal in ground pebble tech pool
Triton 100HD 4.91sq. ft. filter area sand filter
Challenger High flow 2HP pump/motor