Les: It's from the mfgr specs and is as good as their word. Bill has some pretty good evidence that the Eheim P-Q curves are a bit optimistic. Of course he's also a mfgr now too and subject to the same suspicions right? I personally think the Via Aqua numbers are bogus for sure (as mentioned above).
But hey we have to start somewhere right? Of interest to me is the apparent dominance of a relatively inexpensive pump (Danner Mag3) and the high head performance of Swiftech's new entry.
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