I have a chocolate Raphael cat that stays inside a hole in a piece of driftwood. I can not get him out of the hole to get him out of the tank. I don't want to hurt him but I do need to get him out of the tank. I have tried everything short of harponing him. He will not come out even after lights go off. He must wait until I turn off the TV and all of the lights before he comes out at night to eat. Any ideas??