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??? I've never heard anyone complain about a Red Sea Berlin. Mine works fine and produces a very concentrated thick sludge with hardly any foam at all. I bought mine after seeing 3 of them being used on beautiful tanks run by Rob Toonen here in Davis. If a published authority like Rob uses them, they can't be too bad. Anyone else have problems with these skimmers?? What skimmer would you recommend for a small tank like this??Berlin skimmers have a terrible reputation for not working properly.