I found out what the mystery plant is. Both plants are native to north america and are doing well in the warmer aquarium water. I use plant gro by Nutrafin once a week. I've divided them up so there is at least one "root" on each elodea and a bundle of roots on each pond weed. I'm going to be sending some to friends in nanaimo, so after that I may be able to ship in BC or Canada, if it works lol. I just don't want them dying in the mail.