Water with Green Tint, any ideas

[atomasze]

I am having a tough problem with the pool this year. I have been using the BBB method for several years with no problem. This year the pool has had a green tint. I thought it was an algea, so i shocked. Kept shock around 15 to 20 ppm for 7 days with no improvement in the green tint.
I then began to suspect metals in the water. So i tried a metal remover from the local pool store. Brought the ph down, let the chlorine go to zero, as instructed by product and added to pool. Sure enough after a couple of days i had a non-green tinted pool, but you could see a bit of haze in the water, i can live with that. Brought the ph back up, 7.6, and added Chlorine, normally keep around 3ppm, and 2 days later the green tint is back.
The pool isn't cloudy, or slimey sided, just tinited green. I did the over night chlorine check and i lose about 0.5ppm. There is a heater attached and i am wondering if the manifold from that could be leaching metal into the pool.

Its a 33000 gal inground, with vinyl liner. This mornings readings

PH 7.6
FC 2.5
CC 0.5
ALK 110

Anything i'm missing?

[mbar]

It does sound like metals. Take your ph down to 7.2. The water may have clouded from the metal remover. Keep your filter running 24/7 - if the water does not turn blue, you may need a little more metal remover. Let us know how you do.

[CarlD]

You may want to get a copper test kit--it's a drop test available from Taylor or one of their on-line dealers.