Just for an idea, check out some of Laguna's pond pumps. I'm running the 2900 in my sump now for 9 months, my LFS runs one in their place for a couple tanks for a couple years now and they're pretty decent pumps. The do require a bit of retrofit for our application but seem to run really well. Mine draws 160W of power but gives me well into the 1200 gph after 12' of head.
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