Thanks, Drummereef.
The Deltec works well and pulls out some really foul smelling stuff (think nasty sewage smell). I don't pull out a lot, but I'm light on the feedings. The best thing about this HOB skimmer is that it is really quiet - seeing that the pump is on the outside of the tank. For me, a quiet skimmer was second on important features, right after performance.
The Seio 1500 that I'm running has a small amount of flow adjustment. I have it closed off as far as it can go. I am happy with the amount of flow but it is really concentrated. I'm guessing that with the closed adjustment, I'm running about 1200-1300GPH. Using two Nano 6025 would theoretically give me the same amount of flow but with better dispersion.
I'm thinking that if I went with a 6045 then I 'd have the same amount of flow that I have with the Seio. Add another 6025 and the flow would be too much. Do you think this logic makes sense?