Yeah, see, its not that i dont think the nano cube doesnt have enouph filtration. Its just i have always over done my filtration on my FW tanks. Salt water is a new concept for me. But if i was going to add this to my 601-LED cube. I would have to do some cutting it looks like. I only want the best for the corals and future fish! but dont want to "destroy the unit" that is retailing for $650 still. i got it at a steal for 200 w stand, live rock, live sand, and cycled (6 months old). I am picking it up today, i will be adding lace rock (dead) to it in hopes it becomes live rock (sitting on live rock). But thats another thread i started.