I have this problem for the past couple of weeks and it seems that it is escalating very rapidly. Basically my pool chemistry is as usual. Today's readings are: FC=2.5; PH=7.2; Alkalinity=100; Calcium Hardness=270; Saturation Index=-0.2. The pool is clean, but not very welcoming due to cloudy water. It looks like there is too much air tiny bubbles in the water. I read on TFP that the cause might be a leak in the system, but there are no leaks except a very minor one that is coming from the pump itself. How can I trouble shoot this problem and what could be done. I was thinking to close down the pool next week for couple days to drain it partially and the fill it up with fresh water. That would be my last resort. With the way things are going, I may have to close the pool per city regulations (once the black disk at the bottom of the pool will stop being visible). Maybe someone had similar problem?