i built a refugium w/a 30 gallon i had! it worked pretty good !but the guy @ the lfs has acouple 125's i asked him what he use to filter em,one=refugium,and one canister, i thought the same thing you did about those, cause prior to this take i had a 55 with the refugium, its the brand new 360 by marineland has,ceramic filter, bio balls,polishers,and carbon.everything the other has!and easy to clean as long as you remeber to take the suction line out of the tanklol...TIME WILL TELL! if the properties of the tank continue this way with the canister. ill use the extra time to beautify my tank! also, what could i use to substitute food for snails?