We have an inground Sylvan kidney shaped cement pool. We opened it two days ago and applied the usual shock. Today, I tested the water, and there was no free chlorine. Additionally, theAlk was 60, pH was 6.2, and CyA was 0. the water looks very cloudy and green. I tested for nitrates, and that was 3.0 after 30 seconds and over 50 ppm on the 60 second nitrate test. I am not sure where to begin here since so many things are off, and I could sure use your help in getting everything restored to normal. Did I mention that I am having a birthday pool party for myself in 8 days? Any help that you can give will be most appreciated. Thank you in advance.