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.
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.