ACK! Tiny snails!

[Lady Tottington]

Hi friends! I was happily getting ready for bed this evening when I glanced over at my catts to see how they where, when something tiny caught my eye! ACK! LOOK! These were all the ones I could see happily scooting around on the moss I have on the top (which was mildly moist from today's watering). How did this happen? These are indoor plants that I got about two months ago and repotted to a bark/charcoal/perlite mixture as soon as they were mine. I have never seen these little buggers before.

What do I do? I'm not even sure what type of damage they could do, but I don't suspect they would be at all beneficial. Rrrgh.

eeesh.

Thanks friends!