Small critters crawling on tank glass???

[FishDog]

What the heck is the size of dust particles and crawls? I have a tank that has something crawling on the glass. They are white and look like dust specs but move. I have no idea what it could be, any ideas?

 

[keltonsports]

I had those too, dont know what they are but I had a pair of texas spawn in the tank. After the fry we free swimming, the little specs were all gone. The fry ate them.... Still donno what they are but for me they just helped the fry grow...