Hi all ..guess I'm still in the eighties? The concept of the refugium is new to me. I have a Pro Clear 75 wet/dry with bio balls and everything seems to be fine. But I do like the refugium concept. I ran across a pic of my PC filter converted into a refugium and it looks pretty easy to do. Will the filtration and water quality be better if I chuck the bio balls and replace that section with a light and a fuge?I enclosed a pic. I am limited on space under the tank and this seems to be a perfect setup if I decide to do this...Thanks in advance...J