unkown creature

Hey guys, first of all have a happy holidays. I have noticed this a while ago but thought that they would go away eventually. My tank is a 125g FOWLR soon to be reef, its been up for about 3 months now. About 2 months ago i noticed very very small things on the front glass. I first thought that...

So I have had a 10-gallon refugium for over a month now and was raising copepods and amphipods in it. I bought some copepod cultures on eBay, but along with copepods, I have this small floating organism that has been rapidly reproducing in my tank. It's about the size of a copepod, transparent...