QT - What are these?

[Fringe09]

Hi Guys,

I've had my QT up and running for almost a month. No fish. Just saltwater, filter, and a heater.

I started noticing the following all over the tank. I have no idea what these are. Anyone have any clue?

 

[Fringe09]

Forgot to mention that I started seeing it when I added air pump and stone.