pond filter

[boydie]

hey all,im going to setup a couple of outdoor growout ponds and was thinking about making some diy filters.
has anyone got any ideas.the tanks will be about 500 lts.
looking forward to your ideas. :D
cheers boydie

[Matt15]

Boydie if your looking seriously at outdoor growout tanks I'd google the word "aquaculture".
You'll get hundreds of hits and ideas there.