This article says to switch out bio-media every three months which I do not agree with, everything else is on spot!I have seen references to a broken link on how to back flush a Eheim classic. Does anybody have a working link or can describe the process?
Hmm I though it was there. As far as I know backflushing is a common thing to do with the classics.Yes, the Grigg article seems to have edited out the back flush potion of the original article--maybe its not standard practice to do so anymore. I guess you are of the school that rinses out the media rather than replacing it? I would rather do that.