John,
Adjust your Alk first somewhere between 100 and 120 ppm then check your pH and adjust if necessary. Make your adjustment wait a couple of hours and retest. Once Alk and pH are in line shock your tub with MPS (chlorine free shock), this should cut down the foam issue you are having. Take your time, it doesnt happen in 15 minutes.
Our tub circulated 2 time a day for 2 hours each time so the factory setting from Sundance seems about right.