If you have high light, Red Root Floaters are pretty also. Short roots, green/red leaves. Much smaller plants than Frogbit or dwarf water lettuce. Those two 2.5 gallon Petsmart tanks have a 24 inch Finnex RayII over the top of them. WAY too much light, so I use the floaters to cut it back a bit. I wanted to get the HC going, which it is now. I can probably cut back the light to where I don't affect the HC's existence. It has rooted well into the substrate, which was the reason that I bombarded the little tanks with light. The HC is probably 2 inches thick at this point.