Much like discus, small severums do better in groups. If you keep two or three, you’re going to run into a dominant fish who bullies the other.
The best thing to try is taking both fish out, drastically rearranging the tank, and re-adding them at the same time so they’re on neutral ground. Otherwise you’ll have to add a few more severums, which in a 55 won’t work long-term. At 2 - 3” you can probably grow them out for six months or so, but keep in mind as they grow they have less room to avoid each other and therefore more chances of the aggression increasing.
It can be done. Sometimes they will accept each other. I bought two 2” sevs from the LFS a few weeks ago and added them to a 55 gallon quarantine tank. Despite one clearly being the dominant fish, both are eating and doing well, and there’s only minimal picking and chasing now with no real physical damage done. The trick was adding them at the same time.[/QUOTE( would you happen to know how to tell how old a rbp is just curious mine are store bought and the people there didn't know what they were talking about