I have a 55 gallon tank with 5 yellow labs 1" or less each and 1 rubbenose pleco what else can I add to it or any changes need to be made. I have 2 filters running on the tank 1 ac 50 and a whisper 60. Also sand is on the bottom.
More mbunas would work and there are several options, more than anyone could really list. It really depends on what you're looking for in terms of color.
It truly depends on whether you want more aggressive Mbuna, or some of the more mellow species. Me personally, I would add a few more labs and a large group of Demasoni.