We moved and had to leave our wonderful koi pond. We are considering installation of a new one. Our new home has a lake and I was wondering if placing the pump into the lake and having continuous fresh water running from lake through koi pond and down a stream back into the lake would be good, bad, or ugly. The Lake is clean and has plenty of bass and bluegill and also has geese, muskrats and blue herons. Also has 30+ very large orange/yellow possibly koi or some hybrid carp/goldfish.