Incase anybody searches this thread I thought I should add that I have now experienced problems. The female caca began displaying to the male. He then in turn started to threaten the ram by swimming close to him all the time, the ram over powered the male caca after the strangest display of fish behaviour I have seen, lots of twisting turning and swimming vertically by the male cacatuoides. The male ram is now a tyrant after winning this fight and the male cacatuoides has resigned to the shadows, i think he will die. I will take the ram to the local fish shop sadly. My dream of having two apisto species in a 30 gallon is over.......