Thats how they do it. They breed like crazy once you get them to breeding size. The cool part is though is that you can leave the fry in the tank and they will help raise the next batch of fry and so on and so on.
Also if you add new fish they will be like a swarm of bees and all the the brichardis, parents and fry will attack and kill the intruder. It is quite a sight to see.