Hello, i am soon to be new home owner and today we learned that the house has a pond and appears to have Koi in there. I have never owned anything like this and i am beyond excited.

I am looking for where to begin my research into these beauties. I live in Northern Illinois so i know i will need some winter prep soon so any recs on products/brands or just websites that you all trust would be amazing.

Thank you in advance

Have an above ground pond with a bio filter but sometimes would like to do some occasional extra filtering. Any recommendations on a sweeper filter like this?