i was seriously talking about this yesterday lol i was thinking about these also... but in regards to the 55 gallon drums... what if i just did it on a bigger scale... instead of drums could i build a im guessing something like a 5x5x5 square is use this is a filter or how big would it have to be? if not i might really have to get the Advantage 15 bead filters im new and ready to take criticism and ideas