help??

[365seasons]

Our tank has been set up for a little over two months now. We have about 45 lbs of live rock, and only an urchin, and a sand sifting starfish. Everything was looking perfect, water is testing fine, but now we seem to have hit a problem ( I think?)

There was a pea sized white shell that showed up the other morning in it, and we thought nothing of it. Now there is little....parasitic looking things running all over the glass. You can hardly see them, only when you look REALLY closely, but I'm not sure what they are, if they are dangerous to our critters, and how to get rid of them....
I don't know if the shell is related to the parasite things, or where they stemmed from.

If anyone could shed some light on this, or let me know if possibly a shrimp or something would take care of them, or chemicals, that would be wonderful..

Hopefully someone can give us some help here.


Thanks so much.