I had a mishap upon removing the cover that resulted in lots of debris clouding the pool. Several vacuums have cleared it up for the most part, but still slightly cloudy and a green substance (algae I assume) ringing along the bottom edge and stairs. Took a test trip and pH, TA, and Stabilizer all are at lowest level on the strip (FC is OK.) A trip to pool store reveals that phosphate is thru the roof! Not about to buy phosphate remover! What should I do to get levels to normal and clear up water? I'm not that experienced in chemistry - don't even have a test kit, just strips - my only treatment for the last few seasons was weekly shock treatment and a chlorine disc, and water was fine! Thanks!!