Turface releasing something into water?

[krap101]

I changed my substrate from a aragonite-type sand to turface a few weeks ago. A few days after, my water turned a whitish cloudy (it was expected) and a few days after that, I got some green water. I have a couple plants, but they're pretty weak after a few bouts of staghorn algae, so I'm not sure if I should just do wc's or if I should dose ferts. I'd imagine the Turface is releasing something like iron and other things into the water, and from what I've read, green water can adapt to different nutrients, so starvation is basically out of the question.