i knoe dis is a filtration question, but i wanted feed back from aro guys. im building a sump for my 300gal, did some research, but still could use advice. need blue prints you you guys got some. should i build a refugium in my sump. what kinds of media sould i use. most that ive seen just use bio balls. how should i go about doing this. i already have a 60gal tank, overflow box, bio balls, pvc pipes and, plexie glass. please help!