I have a 3 in male turquoise sev that I have in a 75gal with and red spot sev that is 6in and an EBJD that is about 4.5 to 5 in. And the lat couple days the turquoise sev has been getting tough and trying to fight the EBJD which really isn't smart on his part. No injuries or anything not sure what happened they were fine for a month. So it just depends on the fish. Most sevs are pretty laid back though unless breeding. I'm about to move them to a 90gal 8m waiting for to cycle
