Convicts form pairs, so you really should only keep 1m/1f...or, if you have plenty of room, 2 of each. The bigger male will likely kill the smaller one as stated, and of course the female will prefer to breed with the larger, more dominant fish.
I agree with the above or in some cases you could have 2 males and no females if you don't want to breed.
I read a thread a long time back here and the question was if you breed a striped con with a pink con what will you get?
My serviving frys all are striped however there are a few that are still so small they may turn out pink. So if I have any pink out of 35 servivers maybe 1 or 2 might be pink. I don't think any will be pink though. I think pink is like the albino jean and not very dominant
my black male/pink female pair's first batch are looking to be all black. i took the parent sout of th etnak right after the eggs hatched because i thought they ate all the fry, but it turns out all the fry were doing fine. most were eaten by a platy that got out of her breeding box in the tank (yes the convict and platy fry are in the same tank and doing fine together). i asked the question about how the young will turn out. i was hoping i would get at least some calico babies, but so far all are black. i have heard that pink was also dominant and that is why they are so easy to find now.
Yes the cons are very good parents. I took my female out of the tank after looking after her fries for 2 weeks. She would help raise them by chewing up the food small and spitting it out to her fry.
I then put the female in my 90gal with my Green Terror, TX cichlid and a large male con and then those 2 had a batch of fryes and both the cons held the other fish back for 2 weeks. Sunday I moved the new fries to the tank with the others and all are doing fine.
So I think it's a good thing to keep the parents with the fries because the adults seem to protect and raise them.