total water displacement in a 58 gallon tank is nothing in terms of turbulance. You can keep most any fish in this tnak w/o concern of them being "blown away."
As an example - I have a 55 gallon freshwater tank - it has a Filstar xp3 (350 GPH
) and 2 Hagen power heads each at 175 gph
. That's a total of 700 GPH
and none of my fish are blown away.
The effeciency of canisters over other methods is not really what your concern here is - I don't think - but just for the record I agree with other posts - canisters are tyically pretty effecient filters at lower flow rates.