I still have no idea what is up with my oscar. I have tried almost everything that ive been told to try and he/she barely eats. My Oscar who used to eat twice a day, pellets and krill now will maybe eat once every three days if im lucky and usually it only will be krill... and only one peice at that. I dont understand. Maybe I just have a very picky oscar or could it be his tank mates? I'm new to most of this and my roommate used to help me with him but just recently moved out so I'm trying to figure things out on my own. My oscar is about 7-8 inches. Is he/she unhappy? I changed the water recently and it seemed to perk him/her up a bit but also my roommate put in some carbon in my rena filter and I didn't know if that may have messed up him somehow. Any imput will be greatly appreciated. 