jtwigs wrote:

i am a relative newbie when it comes to planted aquariums and this afternoon
i discovered a tiny snail making it's way across the glass. i assume that it
was introduced to the tank with some of my plants.

should i be worried about there being more in the tank? are they potentially
dangerous to my plants? are they a benefit in terms of keeping the tank
clean?

From the FAQ
http://faq.thekrib.com/snails.html