Over the last two weeks we started to lose chlorine in the pool. We have a floating chlorinator that had been keeping the chlorine level around 5, and I've been testing daily and weekly. Two weeks ago our pool turned milky overnight and the chlorine dropped to 0. I was able to clear up the pool in 24 hours by shocking it, but since then the chlorine keeps dropping to 0 every 3 days or so. I then add Clorox to bring the level back up, but it just goes back to 0 in a few days. The water looks crystal clear and we vacuum and brush it regularly. All other levels are where they need to be, including CYA, which has been at 40 for the last 6 weeks.
Where is the chlorine going? We go through 5-6 trichlor tablets a week.