I just bought the Red Sea Berlin Classic, and now I regret it. I even called Red Sea for help today and they were no help. The support staff couldn't even tell me the difference between a regular 700 GPH pump and the new Red Sea Berlin Turbo. A real wishy-washy answer. My problem was my RIO2500 pump, which I was told would be lots, never produced enough to get the skimmer working. I asked about the Berlin Turbo and Red Sea can't tell me what the Turbo actually is. So now I'm stuck with a $300.00 skimmer and need a new pump. Every one is now telling me the Red Sea is inferrior to most of the newer skimmers. Non of the stores here sell the Turbo upgrade kit, so tomorrow I'll go spend another $100.00 for a Mag 7 pump.