Whats this???

A FEW DAYS AGO I FOUND THIS ON A ROCK. TODAY I NOTICED IT WAS IN A DIFFERENT SPOT ON THE SAME ROCK. NOW ITS GONE. I also found it on the glass of the refugium. sorry the pictures are a little blury.

 

i have the same in my tank, its some sort of red macro algae, it doesnt look like the start of cyano. Its pretty well stayed in check in my tank but not without closely monitering phosphates and lighting. Actually ended up looking kinda cool

 

I don't know if you're referring to the white dots or the calcareous hollow worm body. If it's the former, they are either spirorbid worms, or sponges. It's hard to tell from the pics.

 

Is it the little red thing? looks like a bristle worm. no harm there, they eat "leftovers"

 

Looks like the same thing this person has http://www.3reef.com/forums/id/orange-red-root-95127.html

 

The red thing is a macro. possibly red the beginning of red turf algae but it's too small to tell.

Beyond the Refugium: A Macroalgae Primer by Sarah Lardizabal - Reefkeeping.com