Hello, guys! This is my first post at the APC forum, but I've been watching you for a while

I really liked this thread, coz there were a lot of comments, both positive and negative, looked like a heated discussion.
Two weeks ago I got green water in my 30g newly set up tank. I tried blackout for five or six days, which led to no results but weakened plants. Then I put five willow branches in my tank (it was Salix alba, I believe) and eagerly waited for the results. Water started to clear as first roots appeared (days 4th to 6th, depending on branches). After only three days of rooting I have very clear water in my tank. Thank you very much, Oleg!
I want to comment one more thing. Here some guys tried to use aspirin to get rid of green water. I think it's quite fruitless because algae that cause water to get green, and my green water was apparently caused by algae, have a lot in common with higher plants: that's really hard to find an antibiotic that can selectively affect algae leaving alone plants. Aspirin, which is really found in Salix species, is hardly to have this selective property. Moreover, as the majority of people have noticed using willow branches, water in their tanks clears only after rooting of willow, which means that willow sucks up some nutritions from water rather than producing something into water.
And one more funny thing to notice: this method was introduced by a Russian fellow, which makes me think that I have to read more Russian forums, for my native language is Russian. Anyway, it was funny to discover this topic being so popupar at one of the best aquascaping forums to my mind))