Well, I have never bred bettas before, but my female and male have had eggs and stuff. The male will build a bubble nest somewhere where there is little current. Mine does it by a plant so the bubbles stay. Then the female comes over and lays the eggs. The male will flip her upside down and squeeze out some eggs. The eggs float around. He then collects the eggs in his mouth and attaches them to the bubble nest. The female floats for a bit (she looks dead) but then swims back to the male and they start over. I have watched them once, and they did this about ten times in a row. The next day, the eggs would be all gone because someone ate them. If you have the male in a tank with no other fish, then the eggs should be ok. You have to take the female out after spawning or else she will try to eat the eggs. Hope this helps.