I hear that. I have raised quite a few green terror's and when they stop eating thats when things go down hill whether from stress,illness and injury. So if he's eating decent amount and consistantly everyday that's a BIG positive! Sounds like if he is eating good and if he doesnt have any stressers to bother him, he should recoup fine not to mention just settling into his new tank will be a big bonus. Good Luck with him He will be a stunner if he pulls through!