First time salt questions

[Doormatt]

Thanks for the info Reeferaddict! I realize that in this hobby, there's always more than one way to skin a cat, but everything I've read so far follows what you said. I'd still love to hear from the BB crowd though!

Another question...

I've got a Fluval 304 Canister filter...If I take the sponges out, and fill it with live rock rubble, could it not act like a small refugium?