I forgot to mention that the tank I used for breeding siamese fighters had been set up with a glass divider, so the female could be removed without disturbing the bubble nest. The divider was used again to remove the male.
The best way to breed bubble nesters is usually to have a male and female alone in a tank. The male builds the bubble nest, then mates with the female who drops the eggs. At this point she should be removed to another tank. The male collects the eggs in his mouth a squirts the eggs into the...