Pool has turned greenish yellow in the past 6 days. The water has been tested professionally and is in all necessary perameters. I have used sparkle-up from bioguard twice and I still have no results. When I vacuum the bottom it appears as though silt is comming out of the jets. When the backwash is done the glass turns clear.
I am told that there may be a phosphate problem. There has not been any fertilizer around the pool
Does anybody have any suggestions