bought some more rummy nose tetra today and the guy gave me about 20 snails. he said its good for the tank. there were alot of snails in all the tanks im not sure what they are but i see them in alot of other LFS tanks as well so im assuming they are pretty common? also my puffer really likes these he eats them right up! what i want to know is what kind of snails are they and are they any good?