DIY biofilter!

[cdnngr]

Hey there! I am looking to make my own biofilter for a small pond. Has anyone here made one? I am looking for suggestions on water pumps brands without breaking the bank!

 

[lazy gardener]

How big a pond?

 

[AZrachel]

any luck on doing it? I'm interested in doing it myself...I have four ducks - do you think a giant biofilter would actually work for a 300 gallon pond?