some things too consider!! If you are adding live rock it is pointless to add any mech or substraight in the cannister filter.... the only thing cannister filters will be good for is a place too put carbon, polish the water (clean the top of the water), and add water flow.. the live rock and the sandbed (if you are going with a sand bed) will do all the breking down of nutrience in the tank.. and 1 more thing see if the rock is cured or not.. if not you will want to cure the rock before adding any fish or cleaning crew... so much to learn and have fun doing it ...
hth
