i bought my first aro a couple of weeks ago and hes doing well so i thought id get another. the new aro is only 1-2" smaller so i figured they would be cool together. so i put him in went to dinner and i come home and he is swimming to the bottom of the tank and is all beat up. is this normal? what should i do? i have another tank i can put him in but it has a bunch of angels and such in it. is this an option? please help!