I got some frogbit, Dwarf water lettuce, and red root floaters about a month ago. They lost most of their longer roots in shipping as expected, and some roots melted off initially as expected also. The frogbit then put out some insanely long roots, reaching the bottom of my 10 gallon tank after a couple weeks and creating a tangled jungle of roots in my 2.5 gallon, and the water lettuce all put out some 4-5" roots. Now all the sudden all those super long roots on my frogbit in the 10 gallon tank started looking a little stringy and then disappeared by the time I got home from work. The frogbits still look super healthy and have lots of 2-3" roots, and all the other floaters are still healthy with no root loss. The long frogbit roots in the 2.5 gallon are still going strong as well. I dose some liquid ferts every 2 or 3 days, a little less than the bottle suggests. The pH for the 10 gallon stays at 6.6, with around 10-15 on the nitrates, 0 ammonia and nitrites. The 2.5 has pH 6.4, 5 nitrates, 0 nitrites and ammonia. The only thing that has changed in the 10gallon was the addition of a mystery snail and a nerite snail (and no visible algae now, although it wasn't out of hand in the first place). The mystery snail completely cleans up all decaying plant material and is constantly making its rounds cleaning up the tank, while the nerite sticks to making his rounds on the glass and narrow sagittaria leaves. I have caught them both navigating the undersides of the floaters, but not actually munching on any of them. I'm thinking it may have been the mystery snail with how efficient he is at cleaning up all the plant matter. Are they known to snack on frogbit roots? Anybody have any experience with that? Any suggestions on other possibilities? If it's the mystery snail then I'll just have to live with it, but I really liked the crazy long roots so if it could be something else then I'm all ears. Photo shows some of the roots before (about a weeks ago), you can see a few of the super long frogbit roots in it.