Mine used to be rotten and brown, which seems to be normal. However, now that I have moved, it's bright green. Things that are different, include - larger tank space, less ambient light & new yellow tang. I guess it must be from the additional herbivore type foods that I'm feeding my YT.
![Confused :confused: :confused:](data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7)