[Mytoy]

I need help!!!! I just noticed tonight some little critters crawling all over my LR. They look like really tiny nassarius snails. They are white/transparent, cone, shaped shells and are the size of a small grain of rice. Not sure what they are. I have both nassarius and astreas in the tank. I would include a pic, but I can't get close enough to get a clear pic of the things. Anyone know what these could possibly be?????