ONe of my wild discus is super skinny compared to the rest of them. I have ten discus in all and the green tefe is super skinny. Can anyone give me some help, they are in a 180 gallon with a 50gl sump with 30 pounds of media. I put him in a quaranteen tank and he has been eating tube-fx worms. Maybe an internal parasite? i heard wilds a prone to that