I am upgrading my two small shubunkin goldfish to a 55 gallon planted aquarium and want to introduce another species of fish. I am thinking of adding a school of White Cloud Mountain minnows in as well after the goldfish go in, but have read that minnows are fin nippers. Does this apply to slower, flowy finned varieties like fancy goldfish, or to faster shubunkin and comet varieties as well? I don't want the minnows nipping at my goldfish, but I really do want to add a fish other than goldfish to the tank.