Our Arizona 15K gallon pebble tec pool, with no SWG, got algae. We've been shocking it with bleach the last few days and it looks good. Used the pool calculator! Finally our newly ordered Autopilot DIG 220 and SC-48 cell arrived. Leslie's installed yesterday. Read the manual and found can't start the unit until FC is between 1-3. Installer said don't start pump and we have to wait until FC gets down to start SWG. FC was at 7 this am, tested by Leslies. I tested 2 hours later and got 13 with my new FAS DPD kit. What/whose test is more accurate and must I wait until FC is 3? My CYA last tested at 125 by Leslies and 3 days earlier they tested it at 90. So thought I should have higher FC target level. Please help! I did have a return flight tomorrow to Michigan - guess not!