You know, I would have thought the same thing as Willow before I ran a system with that Deltec. I have the Deltec set up on a 44g cube. I also have an ASM G4X with the recirculating mod set up on my 230g. The Deltec skims every bit as good if not better than the the ASM. I have a sump on my cube and could run an in sump skimmer if I chose to but I would be hard pressed to be convinced to take the Deltec out of operation. I also have a Remora Pro (yeah I know too many skimmers in my house) and would rate the performance as good, not as good as the Deltec, but still good. It's just as Beverly said it's that darn honking Mag pump in the tank.
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