Never looked at that kind. I just wanted to get a few nice ones to swim around. I have 19 gold fish, but they hardly come up to the top. The koi on the other hand swim around and you can see them. They also don't swim away as soon as you walk up to the pond to look.
Alot of people have good luck waiting for the foliage to die back in fall and putting the root ball in a gallon size baggie in the dark inside for the winter. I dug a 30x 100 foot pond in my backyard with my old bulldozer in '02. Didn't have to line it because everything here is clay a foot down. Here'* a couple shots taken when I put a nice rock in the pond on top of some cinderblocks for turtles and frogs to hang out on.
Just bluegill and sunfish. I put a 8 inch bass in there when new in '02 which was just under 24 inches when he died spring of '09. Hard freeze that winter killed all but the smallest bluegill and sunfish. "Lance Bass" knew me by sight and came to me daily for trout chow pellets I feed him one at a time. Almost like a pet. The is alot of newts, toads, green headed frogs, painted turtles, and one snapper about a foot across. He keeps the fish count down. Sunfish are very prolific. We have an occasional Heron who help out as well.