hes been laying on his side for the past day or so i just got him 3 days ago i did notices he has a piece of his bottom fin ripped hes small 4" or less i have him with a clown knife, clown loach, and a pleco. i keep a good eye on the tank as much as i can even hours at a time and no aggression has been showed toward any of the fish in there he just minds his own and swims around i do have places for him to hide as well.. what do you think hes doing?? thanks for any info