We picked up some koi and catfish. We're going back next week for a black catfish and a black koi, they were out when we went. We got a small gray catfish, two small koi, a medium koi that looks like a tortie cat, and a semi large gorgeous white butterfly koi. The koi are from Israel and they were so active and friendly. They ate out of our hands. I tied some CDs up on the trees, the reflections and shine of them should ward off the heron. We're going to look for a pond cover, a very fine mesh so it doesn't make the pond ugly.