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Title: Try something else
Review: As the other reviewer had seen, this thing does not skim very well. Same micro bubbles, same over flowing, same raising out of the water as much as possible. I would set a good height that seemed it would make some good skimmate, to return later to find it overflowing. I did find out that the black knob at the top of the cup is a drain for the cup, but I have not seen if it keeps in skimmate or fixes the problem. The only redeeming quality of this skimmer is that it does come with a small powerhead, so it isn't a total loss.
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