Wolfia is hard to keep. It is so tiny that everything eats it and it ends up getting sucked into the AP and is lost. It needs still water to do well. I find the larger duckweeds much better. There isn't a big difference in nutrician.
Jackalope-
Just say the word and I'll send you a mess. The local ponds here are loaded until it cools off, which could be any day.