A few days ago, I thought maybe something was living in my filter cartridge, so I removed that and continued with my program of keeping the pool at shock level. Still no change. Also, I thought it might be the amonia issue due to degraded CYA because I had that problem last year. I have a 40-50 CYA reading this spring which is only down slightly from closing last fall. There was a lot of pollen a week ago, but has since not been an issue.

My plan is to continue with holding above shock, but this is getting ridiculous!! Like I said, the water is crystal clear and inviting. No visible signs of any issue other than my crazy chlorine readings....