I opened my pool up this year to find a nice clean water and no cya detected. I of coarse added somecya and shocked the pool for a few days with a cya of 30. All was well and as I am under a tree canopy I have to constantly vac the leaves off the pool.I may not have been as diligent as I should have been as the water turned cloudy. I have shocked and vaced and scrubbed to no avail. I have read that some chemical that clumps the small particles together will enable these fines to be picked up and cleared out by the sand filter. A clarifyer I believe is what it was called. Or a floc can be used also. I never had to do this before but maybe something has changed? I also wonder if I have developed channels in the sand bed and need to clean the sand to eliminate that problem. I do not know about the sand things I read as everyone has a different take oln that. some say you never need to change your sand and others say you do. I guess there is a way to clean the sand in place also. I have also read that the small particles tend to be in the bottom layers of the water and they therefore do not get filtered out and just stay on the bottom. So I put the vac hose on the bottom and let the water pick up from there for a night and it does not seem to be helping with one overnight period.
Any help here would be greatly appreciated!