Keeping native fish in aquariums is a lot of fun and it is amazing how much you learn by watching them.
So true ! After a few days I suggest you put Tom or Jerry back in the pond. If one is dominant in the tank the other will suffer over time. Once they get any size and aggression it gets hard to keep all of them alive. LMB that are not feed trained often don't last more than a couple weeks unless they are eating the other inhabitants. Let us know how things go.