I moved my last survivor to the display tank about 4 of 5 days ago. I only see him for about 2 or 3minutes a day. Most of the time I need to use a flashlight to find him in caves. Today was the first time he actually swam around a bit and it was only because he was out during the night and when the light came out he swam back into a cave. I just keep a couple shore shrimp in the tank and when I cant find 3 I add a few more so there's always some in the tank for him to find.