200 gallon pond filter?

[woodoc007]

I down sized my pond from 2500 gals. to 200 gals. I was wondering if I still need a filter. I have a pump for the waterfall. More so now, it's like a pondless waterfall feature. But I do have three small fish.

 

[Ralston18]

Yes.

Source:

http://www.watergarden.org/site/Filter_index.html

"Filter options up to 500 gallons" noted. i.e., no exclusions for less than "X" gallons.

And I would expect other factors such as surface area, depth, location, would have an impact - the objective is clean habitable water for the fish. Yes on that alone.

Nothing to do with computers per se, I know. But my curiousity about things in general just takes over......