How to tell male and female discus post pictures.

[John_Nicholson]

While there are a few things you can look for the only real way to know is to see them spawn and have that spawning produce fry.

-john

[Larry Bugg]

Have a few pair breeding but not success fully hatch . Don't know why they breed every week.but no ferterlize

Well, have you considered that they might not be a pair but two females instead?