Black Kuhli Behavior

[nashnut]

I have three kuhlis and two black kuhlis in one tank. The are active both during the day and during the night. Does anyone know the spawning basics with the black kuhli? I've noticed that the one black kuhli has gotten bulkier in the stomach area - no discoloration - and has taken to hiding most of the time rather than being out like it was before. It comes out to eat and appears active and healthy but just it's taken to hiding more than normal.

 

[dwarfgourami]

All I know is khuulies produce bright green eggs which they stick to plants.