Never owned a pool before. Just completed a 12,000 gallen gunite pool. I am located in Alabama. The pool has an ozone generator installed. When testing my water after the intial startup chemicals were added everything looks great except the free chlorine is low. I read an article that says ozone and free chlorine fight one another. Is that why my free chlorine is low? Should I care? When I take my water samples to have them tested will the pool supply company understand why the chlorine levels are low?