Pond Boss Forums AERATION Systems questions Pond filter for 1/4 acre pond?

How deep are your pockets?

Typically ponds like yours don't have filter systems, the pond IS the filter itself. Koi ponds have filters that will filter the volume of water in the pond between 1 to 1.5 times PER HOUR. I bet if you spec'd out a filter system for your pond the system would cost multiple times what it cost to build your pond, and then you'd have the monthly cost of electricity to run the pumps.