Pool water has been great for several weeks chemicals finally stabled out and we were doing well. All of a sudden a couple or so days ago I noticed the water was murky with a greenish(?) tint to it. I’ve done overnight chlorine loss test no drop, cc is at 0.5 cya is 70 FC is 7. Should I SLAM or what would be the suggestion here? I’ve thought about adding a little DE to my filter but wanted advice first . Thanks for your help!!!