Is it a natural or home made pond? Plants are natures filters. You may also need to step up or add circulation to the water, via pump, bubbler or fountain etc.
Good going!
We stocked 100 catfish in our pond this spring.. I sure hope they survive the winter! We've not tried fishing for them so we don't know if any are even still alive anyway!
When you get set up you'll have to update with some photos!!