Here's the link: http://www.sepro.com/phoslock/Default.aspx

I bought some Phoslock quite a while back but I haven't used it yet. There's quite a few studies on it, look in the left hand menu for case studies.

And this:
"Phoslock is an environmentally compatible and effective solution in a wide range of water chemistries in ponds, lakes and reservoirs. Phoslock programs require no buffer to protect water quality and aquatic life during and after application."

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