I have a new betta tank with amazon frogbit. I cycled with the frogbit and not snails in sight. After I introduced the betta (pouring the betta out of the bag into the aquarium, like my local fish store told me to do), small snails have started showing up. I looked at them under a magnifier and they look like ramshorn snails (they are so small that the shells are almost see through). I think I read that they will eat the underside of the frogbit. Will they eat the underside of the frogbit? Do I need to try to get rid of them, or can I just welcome them to the tank?