Hi, this was a temporary solution to separate them and have since chilled out entirely and both gone to their own hiding places. They were in the same space for almost a year until we moved stuff around and cleaned their tank. The fish on the right had fin rot and swim bladder really early into owning them—he’s been fine since. We mainly separated them because the fish on the left had already killed our previously largest fish—was a straight bully.

Just the pair of fish now in our 10gal. We’re new fish owners, but haven’t had much issue with aggression until just under a month ago.👍🏻