You should have them in a shallow tank, I used 4" on water.
Put a clear divider btween them, and feed frozen bloodworms and dried flakes.
When you see a small white "dot" on the female's belly, that is the oviposie(SP), pull the divider and the male will probably tear the female up a bit.
He will be making a bubble nest using some floating plant or debris.
Then it should happen, keep the camera in focus and have a brine shrimp hatchery and eggs handy.
After the male spits the eggs into the bubble nest, gently remove the female into a tank with meds.
I usually let the male tend the fry for four or five days. But watch him, he may start eating the fry.
After the hatch, you'll need to progress from baby brine shrimp to a larger food, I used to grind some dry flake between my fingers and feed. It doesn't take much at that point
The mortality rate is high. From about 200 or so fry, I only got about 20 to live to maturity and about 2/3rds of them were females.
Good luck
Charles