I can't say that I really have the space, anymore, but for this one I'll figure something out even if it means I have to dig a temporary pond just for it this year.
Here's the new leaf coming out. Those spines on the outside are sharp, and if you look closely at the inside folds, you'll see the the thorns on the upper side, too. I didn't really want to move it more than one more time because of these, but it's about outgrown the propagation tanks.