I wouldn't use canister filters on a SW
. Too much crap build up.
Put a 29 gallon sump or something of the like on it. You'll thank me later.
Or maybe a couple big Hob
's would do the job, you're still going to want some kind of good flow on there.
My tanks (so far
5.5 gallon Planted Dwarf Puffer tank (2 Dwarf Puffers and a lot of RCS!)
16 Gallon Planted
(GBR pair, 3 amano shrimp and a whole bunch of snails!)