I used a system flush before draining and replacing the water. I then shocked the spa to 12 with dichlor to get some CYA in the water. I think I got the cart ahead of the horse here and should have balanced the water before shocking. I filled the spa out of the hose which is city water and was able to get samples to check the CH and TA. Can I proceed to balance the water or will the high chlorine through off the readings? I did put some calcium chloride in the tub to get the CH up. Im wondering if I need to wait till the FC drops to balance the water. Thanks for any help. Jim