Canister Filter as sump?

[Madreefer]

I ran an FX5 on a fish only tank with all media, sponges etc removed and filled with live rock rubble. But it is no substitute for a sump. No experience using on a frag tank. If you plan on growing frags you would want excellent water parameters and IMO you won't get that with a canister filter

[canadianbudz604]

Depending on what it gonna put in there. If u doing softies and zoas and polyps etc this will work good, if u want it all sps frags +1 to madreefer it's probably not the best

[reef-junkie]

So long term I'd probably be better off just setting up a sump.
At first I plan on only having zoas and some acans / brains but down the road I definitely plan on fragging sps.