My turbos (not astrea turbos, commonly mislabeled) are a little overwhelmed at the amount of brown algae - I had the dotty stuff, slimy stuff and hairy stuff. It wipes away very easily and is only on the front glass (and glass center support beam). I didn't realize it, but I had a couple beams of sunlight reaching through a couple windows near my tank and they match exactly where the stuff is growing (silly me) -- covered those up, it started dissipating and water is clearing up fast (within past couple days). Who would have thought that the sun could be detrimental? Hah.
In your case its just a new-tank bloom. Waterchanges waterchanges what her changes.....uh, yeah.