using a canister filter as a phosban/carbon reactor???

I think you'd have way too much flow and end up with GFO all over your tank (not a good thing).

The phosban reactors are clear so that you can adjust the input pump so that the top of the media gently tumbles. The difference between too much flow and just enough is really small.

-JB

 

I used to run GFO in a filter sock in a canister filter...

 

I plan on using my old fluvals to run carbon. Not sure about gfo

 

http://reefkeeping.com/issues/2004-11/rhf/index.php

 

I have a cascade 1000 that I use to run gfo and carbon in and it's been working great for a year or so. I use fine mesh filter bags and place it in the canister. Every week I take the bags out and rinse really well. The gfo has a tendency to clump up but other than that it works great if you clean it on a regular basis.
I agree that a reactor would work a little better but I already had the canister around so spent the money on coral instead of reactor.