let him be accustomed to the tank after a week or so,as i have observed they really like very clean water,you can put neons,rummy noses etc... small fishes...but as they grow the BGK may peck the eyes of a smaller fishes.,they love to hide and come out at night till dawn,.BGK is a beautifull fish i have seen a person who owns it for years and its like less than 2 feet it just layed down sideways as if it cannot swim its own weight
