So I have a hang on the back refugium. In it is cheato for macro. Recently I have been seeing this green algae growing inside the fuge, and lately growing on the lip of the return, and along the edge of my tank. It's bright green, it grows in like a circular pattern? It hangs on very tight to what its growing on, so it's hard to pull off. I took some off of my return pump and was able to get a picture. It's just a small piece, but I think you can get the picture. Is it a type of nuisance algae, or a type of macro that snuck in with my cheato? It's just odd that it started growing out of the blue, and only in my fuge.