dragon blood peacock

I am looking to get another eyebiter for my 40 gallon aquarium. I had one before but she died unexpectedly. I have residence already in the tank and I have another wit a really mean cobalt zebra. The fish are - 1 dragon blood peacock 5 inches - 1 blue peacock 3 inches - 1 mbuna (not sure what...

Our dragon blood peacock was the dominant male in the tank from pretty much day 1, when he and the rest of the fish were only an inch to 1.5 inches. He is currently the only fish that has reached max size already. He's definitely 6 inches. Some of the other fish may be close to 5 and some of...