Just wondering how you can tell the sexes of the Discus. I have one blue and one spotted leopard and wish to attempting breeding discus but not sure how to tell them apart. I plan to purchase more to start breeding.
Take the natural way.
Allow them to pair up themselves. That is the best
You may know the sex, male and female, put them together.
They still would not breed if one of them is not ready.
They will fight instead.