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

"Best way" is in the eyes of the beholder. Look into biological filters for swimming ponds. The ones that I have seen are approximately the size of the pond, aren't very deep but are filled with plants. A pump takes water from the swimming pond and pumps it into the biological filter, It runs the length of the filter and dumps back into the swimming pond.

That takes out the majority of nutrients that contribute to growing phytoplankton, which is the bottom of the food pyramid for the fish in the pond. What you are trying to do is make a 440,000 gallon aquarium that you can swim in. So, that means physically feeding the fish and not letting things grow in the pond that will feed the fish.