Those are pods and it's a sign that everything is moving along nicely. It's common to have an explosion of pods when a tank is new. They will soon reach and equilibrium with the tank and there won't be as many as there are right now.
Looks like lice all over the glass. Occasionsally Ill see small white critters that look like white ants. Its so cool, everyday I find something new. My kids just love to find a empty sally light foot shells. I personally would love to actually see them molt.