I am back home. I purchased Phosfree from Natural Chemistry and I purchased the Aqua Chek test kit that you listed. The Phosfree came with a test kit included.

I tested the phosphate level with the both. The Natural Chemistry one shows over 1000 ppm for phosphates. The Aqua Chek one shows at least 300 ppm, maybe a little darker.

The pool is crystal clear right now with powdery green algae in the wrinkled areas in the deep end. small spots of visible algae growth in the shadows of the shallow end.

I am going to vacuum to waste and then see what you want to do.

OTO drops show 5 ppm FC. I read the instructions the other day that high chlorine can affect the phosphate test results, so I told her not to add any yesterday.