I wasn't planning on putting any new fish in til i get back from FL which wont be for about 20 some days. And all of my fish were removed from the show tank about 20 days ago, so i'm sure the ich will be gone. Also, can someone answer my MAIN question..How exactly does the refugium filter the aqurium. And also, will I need my millenium bio filters as well? And do I only need live rock in my refugium. Now to sum things up... I need a refugium, my live rock, and my protein skimmer. Is that all the filtration I need in my 55 gal??