"Bowhunter" wrote in message
oups.com...
I'm thinking about making my own biofilter for my 450 gallon pond.
Would a 5 gallon bucket be large enough? I only have a small yard and
the pond takes up most of the area. I would hate to have a big 50
gallon container sitting in the yard next to my pond.
Also what filter media should I use that would be least expensive but
effective?

Look through this stuff...

http://www.skippysstuff.com/index.html

THE WORLD FAMOUS SKIPPY FILTER
http://www.skippysstuff.com/biofiltr.htm

Mini-Me Skip Jr. Biological Filter
http://www.skippysstuff.com/minime.htm
"Good for ponds up to about 750 gallons is our best guess."