Mine bred twice so far, with the courtship descibed here in these forums and fairly extensively in the primer and a section of Jurassic Fishes.
Both times I was unaware what changes had occurred to trigger spawning, although I suspect conditioning and water conditon / changes had some effect. Both occurred over the summer months when there would be more ambient light (& less tank lights on). I had noticed the male pursuing the female all over the tank, which was unusual.
They scattered their eggs into a clump of java moss the first time, and none hatched. The second time I didn't know they had spawned, and sucked up 18fry while vaccuming the gravel near a large java fern they usually hang out near. These went to a rearing tank but I was unsuccessful getting them to eat. None survived past 12 days.
In both cases the temp was 80-81 degrees, nitrates low, pH 8.0, slightly hard water. They bred at ~ 11", despite the presence of other, larger poly's in the tank.
If I get another spawn I'll do things a bit differently, and will post pics this time.
O