However, think water changes. If leaves or debris from this plant is in the waste water and is disposed of through drains or even through garbage disposal while alive, it spreads. This plant spreads through breaking. A leaf or stem piece is enough for it to spread and take over again. This is why its so hard to get rid of it where it has established itself as an escaped aquarium plant in lakes.I think it's fine to have an invasive plant in your tank (if it isn't going to take it over, your tank conditions being different than Lake Tahoe's) but make sure it never leaves your house alive. haha
If it werent as damaging, id have agreed 100% about keeping it, but this particular plant is really bad. Otherwise, an invasive/non native plant is fine in a tank. But this one is on a whole other levelYikes Actually forget any of that, BURN IT! NoodleKeeper is right 100% NOT worth the risk.