I have some ready to ship 8/25. $7 shipped USPS to continental USA. Non CC Paypal please.
It is easier to keep in check and not as invasive as duckweed but it is a fast grower. I haven't gotten any flowers yet and my roots are pink but not red. That is probably just my tank setup.
See plant info here:
Phyllanthus fluitans AKA Red Root Floater
PS - I have some of those little ramshorn type snails in this tank. You "could" get eggs if that concerns you. I will try to pick them off if I see them.