Hello, I got 3 days ago a new aquarium with some fish, and all of the fish in are doing great, eating a lot, swimming, playing around exept for my pictus, it has been swimming like shown on a picture for 2 days, the first day it was doing good, but now it doesn't swim anywhere else, he is also not eating. I am feeding them cichlid mini granules, the first day he was eating like a vaccoom, but now he is not. it is 60l aquarium but I am planning on expanding it to at least 300l in about 3 months. Temperature is set to 26° C. Other fish don't bully him, or interact with him, they ignore him. Do you know what might be the problem here?