Looking at my tank with the lights out, now i need some ID's

[RotaryGeek]

I was looking at my tank last night when the lights were off and came across some things i have never seen. Wanted to see if you guys can help ID some things for me.

http://img685.imageshack.us/img685/8417/photo17c.jpg (http://imageshack.us/photo/my-images/685/photo17c.jpg/)

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First one up is a snail looking thing, but with no shell. It is kinda hard to see in the pic, but its the silvery thing in the center of the picture. Its about the size of a nickel, and maybe a 1/4 to 1/2 thick. It moved pretty slow too, and had to antenna looking things on its head.

http://img209.imageshack.us/img209/2294/photo18q.jpg (http://imageshack.us/photo/my-images/209/photo18q.jpg/)

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Here is another shot, but its not much better. Also, the little snail thats below it and to the left, what is that? There are hundreds of them all over the tank.

http://img842.imageshack.us/img842/6981/photo19y.jpg (http://imageshack.us/photo/my-images/842/photo19y.jpg/)

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Little better pic. Thanks for any help.

[cloak]

The first picture could be a stomatella snail. (harmless) The little snails your seeing are most likely collonista snails. (harmless) Try doing a search on both those names and see if anything looks familiar.