rafecci
Aquarium Advice Activist
This has been growing off my LR. As for behavior it grew upward from the bottom rock to the top rock. Nothing seems to bother it and it just grows. Started as a long "wire looking" and seems to be attaching itself to the other rock. I looked around and I'm thinking it's a sponge. But I also think it looks like snot. Can tanks get colds? (J/K)