hey Ive had my corn for about 2 months now and he's been very active and friendly constantly exploring, and I have an artificial log in the tank where he has a spot that he can go inside and curl up and he always had no problems going in and out but about 4 or five days ago he went up there and hasnt come out at all that Ive seen, and he's always up there, even when I tried to feed him he still only came out about an inch. so someone please help