Id for this snail

[kimmers318]

Several weeks ago I was lucky enough to get a bag full of "pest" snails from a store....mostly the common variety, a few of the ones that look like ice cream cones (forget their names right now) and also ended up with this guy. He wasn't this big when I got him, my dwarf puffer and my clown loaches have left him alone and he is just happily running around cleaning my tank for me. Just curious as to what it is and want to double check that I didn't end up with some kind of nasty snail that is going to grow to huge proportions or get ugly with smaller/slower fish.
http://i65.photobucket.com/albums/h216/kimmers318/snail2.jpg
http://i65.photobucket.com/albums/h216/kimmers318/snail.jpg
http://i65.photobucket.com/albums/h216/kimmers318/snail3.jpg
And aren't ya all proud that I got pics posted without having some of them HUGE? I am getting better at this! :lol:

[rollie]

could be the ramhorn snail, i am not sure.

[kimmers318]

thanks rollie....I did look around a little, but didn't quite see this

[William]

Thanks rollie. Couldn't remember their english name ;-)