Yes..it's frogbit. The roots on some are 10 inches long. I started with enough frogbit to cover the palm of my hand 4 weeks ago...now it has covered 1/2 of my 55 gal. It reproduces so fast. I have it in every tank with a light, and need to thin it out again in the 55. I contain it on one side, and put the low to mid light plants under it..and leave 1 side open for high light plants.
