Thanks for the reply!

This is the second year of opening the pool that I have no CYA in the water. I threw in some trichlor tabs to boost chlorine and CYA. I've had the pool for 6 years now and the last 2 years have been a strange opening.

That chlorine reading I listed was overnight. I also had to replace the DE from the filter ... obviously I had a lot of stuff in my water. I did brush the sides and put in my pool cleaner in for the floor. Since I had over 3 PPM reading this morning I was under the impression that the chlorine had done it's job ... I have put in 3 gallons of bleach at night and wake up to no chlorine. I'll take a chlorine reading tonight and then tommorrow morning and see how the chlorine situation is going

I thought it was an organic (algea) stain but being in chlorine all last year and now this year with at least 8 PPM (possibly more) chlorine (and no cya) I would have thought the stain would have been bleached away. I'll try the magic eraser and see if that does anything.

Thanks again!

Vinny