My husband quite smoking 3 months before our trip to Cayman (good for him) but he had so much trouble with his buoyancy that we were only able to do 2 dives on different days and they were very short. I have a feeling his is breathing so heavily from the exertion that he just can't stay down. He just floats to the top. He had probably 30 lbs on his weight belt and that didn't help. Will this problem go away when his lungs begin to heal? I was disappointed for him and for myself also. We did A LOT of snorkeling and it was all beautiful. Other than that we had a great trip and Cayman was wonderful. Ms Tomato