Canister Filter as sump?

[The Guy]

Originally Posted by reef-junkie

I'm wondering how well I would fair if I didn't overload on sps frags.
approx how many lbs of lr would you say you were able to fit into the canister?

Hard to say exactly but guessing approx. 10-12 lbs., if you left out the trays you could probably get more in. I used the trays just make it easier to pile the rubble in, don't use any sponges or filter media and that will help somewhat to keep the nitrates in check. I never had a problem with nitrate biulding up at all. Mine was closed for over a year, I just last week opened it up, lots of pods, pineapple sponges and brittle stars it looked good. I would go ahead and do it, it'll work well for you I'm sure.
Let me know how it works out for you if you go with it.
Cheers Laurie