Thank you for filling out the Pool Chart. Yours sounds like a beautiful pool!

I suspect your water has a green tinge as a result of the reaction between the Pristine Blue and the copper in that product. Likewise, the black and mustard algae you mentioned in yur first post could possibly be staining from the copper.

I am out of my depth (no pun intended) when it comes to dealing with metals in the water or converting a pool from Pristine Blue to chlorine and I will make Pooldoc aware of your situation so that he can take a look at it. In the meantime, here are a couple of links to older threads discussing this issue.

http://www.poolforum.com/pf2/showthr...ristine%20blue, and
http://www.poolforum.com/pf2/showthr...-amp-More-quot