Hello helpful Internet acquaintances! My boyfriend and I recently purchased a 55 gallon. Petco is having their $1/gallon sale. The only fish that needs to go in is an adolescent rainbow shark currently in quarantine from his old tank. My boyfriend was researching into getting African cichlids, and since it seems a possibility to keep them together, I was wondering if anyone had any advice. I would be interested in hearing any stocking suggestions for the 55 gallon. We're not new to fishkeeping, but "easy" cichlids would be preferential to challenging or demanding species. Thanks in advance!