Hi Paul,
Here's a few links that may help.

http://www.mikebentley.com/ponds/homemadefilters.htm

http://www.skippysstuff.com/biofiltr.htm

http://www.wavepumps.com/state_of_the_art_filters.htm


Happy reading!
Mark



"ul Disdle" wrote in message
...

Does anyone have plans for a diy filter or a recommended site to find
some.

Paul