Hi, I am not sure if this has been covered...sorry if it has...but a few weeks ago, I ordered some Lemon Oscars for our fish department. They came in bright and shiney and yellow...gorgeous. Now I have noticed that their fins are getting darker and are tipped in black. What is the reason behind this? Does anyone know? They seem happy and healthy...just not quite as yellow. Should I be feeding them something special so they keep their color? Any help would be appreciated
Thanks!