Is Tonina fluviatilis very rare in the U.S., or am I just looking in the wrong places? I've seen photos of it, and the "old" Tropica site had it down as a "very difficult" plant. I would love to get my hands on some, but I can't seem to find it anywhere. Or maybe I can once again blame it on the idiots responsible for banning nearly every aquatic plant from California... -Naomi