The first step to breeding discus fish is to find a compatible pair of fish to mate. The sex of discus fish is hard to determine, so it is recommended that you put at least six fish together, and let them pair off naturally. Make sure to mix fish from different stock to avoid genetic degradation.

The way to tell when discus fish are ready to mate, is that they will pair off and become territorial towards the other fish in the tank. When this happens, it’s time to isolate the pair and transfer them to their own breeding tank. A 25 gallon tank with some vertical surfaces for spawning will work fine. Also, you may want to include some hiding places.

Water conditions must be kept under careful control during the breeding process. Nitrogen levels should be close to zero. You should also do a partial (30%) water change every day in the tank where you are breeding discus fish. Make sure the new water is tested every time before you add it.

You need to make sure your fish are getting the right types of food and also actually eating when you are breeding discus fish. Remember too, that poor water quality will stress your fish and decrease their appetite. Make sure any live food you use does not introduce disease and parasites to your discus
fish.

In summary, if you give your discus fish what they want: clean water and healthy food, they will give you what you want — babies. It’s also never a bad idea to get some expert advice and read books that can give you a step-by-step plan for breeding discus fish.