55 Gallon tank with two african cichlids, safe to add just one more?

[Nopsia]

I have a 55 gallon tank. I just moved everything over from a cycled 20 gallon tank to seed bb. The fish have been in the 55 for about 3 days.. I have one female peacock cichlid who hogs most the tank and shoos away my smaller electric yellow which im not sure if its a male or female. This is why id like to add more tank mates to level out aggression.. Would it be safe to add just one more african cichlid for now? or do i HAVE to add multiple at a time?

Thanks

 

[Andrew McFadden]

I like to say 3+ at a time but you could do a lot more than what you have.

http://www.aquariumadvice.com/lake-malawi-mbuna-stocking-dcor-hardware/

 

[bobofishman]

I have 12 Africans in my 55. when i set mine up I added 6 right off the bat . Then I added 4 then 2 and I don't have any aggression in my tank what so ever. And every time I added I would move my stones around so they would all have to find new spots...and mine all range in sizes from 4" dragonblood - 1" demasonsi