I run mine at 40 ppm, 40% and run the pump 6 hrs/day. Seems to keep up fine. I prefer a lower CYA because high CYA causes:
  • Reduced effectiveness of Cl
  • Accelerates plaster erosion
Cells are cheaper than a plaster job! I've had mine running since last year, and have yet to trip the hour limit that tells you to clean the cell.

Michael