in my 65 gallon )4ft by 18 by 18 inches ) i had 7 e. yellows and 5 red empress. they were scared every time i was near the tank . now i put the 4 borleyis back in the tank( after thinking there was too much fish) and the whole lot are swimming around normally all cheerful and happy and not really that scared when im there just the small yellows but the rest are up waiting for food from me. I thought there was something wrong after when i took them out they were all scittish since there is no ammo. trites or trates but since i put them back in they are happy again. i hope this is the only problem.