A guy from Wammas give me for free.. He was sick ..before he has velvet .. And start has hole in head only 2 .. But I don't Wy since I change food .. It grow up more.. I think u are rite.. Maybe I let him eat seafood( scallost, shrimp cod, etc...) he was my 120 gallons .. Now I move him to my qt tank which 10 gallons.. He was doing good..and now hold in head grow up more.. Huh..