I have a pool that hasn't been used in 2 years, and has been uncovered. I decided to open it this year and have been using shock, clarifier, and chlorine floater. It has cleaned up the water to the point to where I can see the bottom of the pool finally after several sessions of sweeping it I have managed to get the debris out, but every time I sweep it the water becomes very cloudy. after turning the pump off and letting it sit for 6-8 hours I can see the bottom again. there is a ton of really fine brown looking material that sits on the bottom that I just can't to seem to get cleaned out of the pool. running out of ideas. all my levels are with in the recommended ranges so not sure what else to do. a should also mention that I have been adding DE to the sand filter. Any and all Help would be greatly appreciated.