I am thinking of starting a nano reef. I have a 20 long and an extra bio wheel around. What should I do with the bio wheel as far as filter media and filter floss? If I understand this correctly filter cartridge can cause all kinds of problems with nitrates? I know that live rock and water changes with a skimmer, and a power head is the best way but this is what I have right now to work with. I Was thinking that I use some chemi pure elite or Purigen or a combo of both with a little filter pad and keep up with water changes. If anyone has any better ideas on what to do with a bio wheel I would love the learn abut it.