PoolSean will probably give you some advice. Need to know what cell you have with your AutoPilot #48, 60. I have a #48 cell running at power level 2 and 40% for 85 degree water temp. I also have 22k gal vinyl, cya 30, sun all day, light to moderate use, 3200ppm salt. Maintains a cl level of 2.5ppm. Also how long are you running your pump.
Dave