Sure id believe it. Tank size w sw o think is often misunderstood. Its not really about gallons, its more length. Tangs, angels, ect like room to swim. So the longer the tank the better. It could be 15 inches high but 6ft long and the fish has its swim room. Now the other is issue is amount of fish. People tend to want to over stock. so get a bigger tank and u can. Rt? Not really lol. I ride The edge of my tank capacity, but I have excellent filtration. Lots of lr and filtration rated for 100 gal in my 75. I truly believe live rock is huge in helping bio filtration just my option tho. With that said dont over stock lol