In my tank iv got bout 6 convicts sizes ranging from a few cm to 2", 4 blue acaras all bout 2", and 4 firemouths all bout 2". They all seem 2 be pairing bt not sure. Are they big anoth 2 breed? What are the sizes of sexual maturity?
a more important question may be, what size tank are these "pairs" in? unless it's quite large, there's going to be territorial mayhem resulting in shredded and perhaps even dead fish.