In a few weeks I'll have some anarchis or water wisteria if you're interested. (they grow underwater, but are great nutrient absorbers and oxygenators, although not as good as hyacinth, probably better than duckweed and azolla)
It's in my aquarium so I prune it frequently...

I also have snails if you want a couple.

I also have a hyacinth, some duckweed, and some azolla, but I don't know how fast it's going to reproduce... I think my snails eat azolla (which is a good thing since it grows so fast from what I hear)

i have some parrot feather just starting back will send for postage do fate rate min. box 11.00 i think now

I have azolla, 1/2 cup for $5.50 priority shipping. PayPal accepted. I ship on Mondays and Tuesdays unless you live close by.