Hi, I inherited a 24 gallon tank with 2 yellow labs and one blue zebra cichlid or so I was informed. Originally I wanted a community tank but was talked into keeping the cichlids with the view of buying more. I have since on the shop owners advice bought 1 aulunocara male, plus 1 pair F1 aulunocara Hai Reefs, the female of which was pregnant on purchasing. I also purchased 2 Neolamprologus Bricardis. That was 2 weeks ago. Yesterday I bought. Pair of Albino Cichlids. The zebra keeps chasing just about everything in the tank and can get very aggressive. I have been told it is. Female, but I am not sure. The anal fin seems rounded rather than pointed. What is the best way to stop this aggression. I have done water changes on each purchase and also moved the rock formation around in the tank each time. Can you please advise.