fish that eat snails would be the best option. I only have room in my tank for 3.5 inches of more fish, so it'd have to be a non-schooler. and we have livebearers in there so it's need to not eat fry.
the tank is planted, so it'll be hard to see everywhere they can lay. espescially since the hornwort they came in on is so dense.

maybe we'll just keep catching and killing, etc.
I did read that copper could kill them as well, so dropped 3 pennies in the tank after cleaning them as best I could. anyone know how quick the pennies will work and if they're bad for livebearers?