I will start off saying I'm not new to the hobby but have been out for 2 years now. I am in the planning stages of getting a reef tank up and running again (180 gallon). My question is this would a large refugium septate from the sump (say 75-120 gallon tank) be enough even if I was heavily stocked to eliminate the need for other filtration? I still plan to have a skimmer and some sort of carbon but prefer all natural for the rest.