Since adding rocks 2 pairs of cichlids seem to be mating. The largest 2 have been doing it a lot, but they both still come up and eat so I guess she has no eggs? What I don't understand is these cichlids were born in captivity. So my thinking is they don't know what rocks are and that any sort of hiding spaces would be fine. After adding the rocks I can see that I was wrong. But how do they know what rocks are if they never saw them before? The largest male seems to be harassing his mate a lot more. Is it because the other females aren't even half his size?