ok well i read an article a while ago when i was gearing up to get an oscar that explained how to add a bio wheel to an aquaclear 500, and now seeing as i have two aquaclear 500's i'm wondering how much of a benafit adding a biowheel would actually have on filtration abality?
here is the link for the article if you're interested.
http://www.oscarfish.com/cms_view_article.php?aid=46



