My ramshorn snails are destroying my frogbit. I have lots of other plants in the tank, and they nibble at all of them, but the frogbit seems to be their favorite. Are their any tough floating plants that snails don't like to snack on?
No offense, but are you positive the snails are eating them? I mean have you actually sat and watched them rasp holes in the frogbit?
There are always several hanging upside down from the frogbit. I haven't seen anything else touch the frogbit, except the water and the glass.