I have a fairly densely planted 29g tank with 6x Keyhole Cichlids. They are highly social, entertaining, and I'm enjoying watching them grow. They are 3" in size now and I realize I will need to upgrade to a larger tank in the near future. They get along well and shoal together most of the time, but most/all of them are male. There might be one that is female, but I'm pretty sure the other five are male. There is localized chasing from some of the dominant fish. There is no damage and none of the fish are stressed. They are still trying to figure out the pecking order (maybe) trying to attract a mate, but I'm not sure there is a female in the group. The plan has been to upgrade to a 55/60 gallon tank and add some SA schooling fish. But first, I want to understand my best options with the Keyholes. Is it unethical to keep them in a same-sex group where they will never breed? If so, should I try to find some females to add to the group when I upgrade tank size? Regarding the aggression, There is some chasing, but a few seconds later they will be shoaled together again, which might lead to more poking and chasing. None of the fish go into hiding, they always manage to group up again. Most of the time they are peaceful and sometimes will enter into a little looping ball of swimming. I have a feeling that even if I upgrade to 55 gallon tank, that there will always be mild aggression between them because they always shoal and they are all male. IOW, getting a larger tank probably wont change their behavior because they are usually together. Should I be looking into rehoming some of the fish, or will they eventually just accept their station and live happily?