What is this stuff? It's in a friends tank and I'm not entirely sure. I think it's some sort of blue-green cyano but when I pinch the stuff, it doesn't disintegrate quite like the regular red stuff does. When trying to figure out an algae, I like to pinch some off and get a real "feel" for it. With red cyano, you can't really pinch it off, it just falls to pieces and you come away with next-to-nothing on your finger. This stuff tends to hold together better and it's got me a bit confused.
