fluval modification


New member
hey guys, ive been reading about folks changing their canister filters by taking everything out and putting live rock rubble, cheato, etc. can this really be done and how effective is it w/o putting together a real sump?

thanks in advance! this forum has excellent reading!!

- mike


I see canister filter as fresh water technology, and if you were to use it in a salt water situation changing out the insides makes no sense, why not just place the live rocks in the tank or sump