I bought a "scoop of floaters" from the LFS and I separated the species because I did not want the Duckweed. I already had Amazon Frogbit in this photo for size comparison, and wanted something else that was bigger than Duckweed. I found these plants that kind of appear to be a waxy water lettuce of some sort, they have lines along the leaves. The underside of the leaves are reddish in color, which is a huge benefit in color contrast when viewing the tank from a lower angle. They are perfect imo, large enough not to be eaten by the filter with wonderful underside coloration. Does this plant need iron to keep its red color the way all other aquarium plants do??