Help! Unknown Snails!

[Andrea]

I have a biocube 8 gallon, its been cycling for 3 weeks. I have live rock and live sand. Last nite I noticed that there were white spots all over the glass. I looked closer and realized they were snails. The largest are about the size of the tip of a ball point pen. I took one out and looked at it under a high powered microscope and it has a smooth round white shell with a dark grey dot on top and has random red orange spots on the shell. With the naked eye the shell would just look white and a hint of a pattern on it. It is not a pyramid snail. I duno if it's dangerous or not. Any help would be awesome!
Thanks in advance, Andrea
p.s. sorry i couldnt get a pic, i tried but it's just too small!

 

[LeviT]

I haven't heard of any snails that are bad, just once that are pain when they knock stuff over.

 

[Elite]

look like this??
http://www.melevsreef.com/id/collonista.html

 

[Andrea]

it could be that, but they are smaller and with less pattern on the shell. They have random red spots all the same size.