Marin,

Thanks for the reply. No control joint was done in original pour. Your plan sounds great but the crack is pretty inconsistent. Also there are areas of the bullnose coping that seem loose on the bond beam (while most seems bonded to the beam very well). Since the deck has basically settled and is sloped down away from the pool I have decided to use a concrete saw to cut a clean edge, which will leave about 10" from edge of bullnose. I can use an expansion joint or pour directly up to the remnant. Can you advise which you think would be better?