Got a new 3-4" fahaka last friday from florida. He looked great and is eating snails just fine, but he just sits in the corner of the tank behind some driftwood and is not active until I throw the snails in. How long will it take before he acclimates and becomes more active? Or will this be his personality? What I have read is that fahakas are very owner responsive and active, which is one of the reasons I wanted one. Water parameters are find and water temp is about 78 degrees. Do dithers work for puffers? I just wish he didnt lay there all day long.