Why did your betta fish stop blowing bubbles?

The male won't make a female a nest because he doesn't know her. That's not true. A male won't build a bubble nest until: The female is introduced into the tank by a glass chimney and the male is released inside the tank. Seeing the female, the male will swim towards her, flaring. He will try to break into the chimney, though he is unable to reach the grand prize (yet!). It is normal for the female to be frightened at first, but once your female has vertical lines appearing on her body, then you are in good shape, if she doesn't, she might change her mind later! LOL! The male will then look possessed, as if in a trance. He will then begin building the bubble nest. This would be a good time to release the female (after the nest is done or well into its way). This is when the female realizes she could get her little fishie but kicked! It's usually the male who beats the crap out of the female. If your male didn't build a bubble nest, it means the female doesn't want to spawn, or because she's not ready ( I mean she doesn't have eggs in her fishie body)! Hope this helps! Bye now, and good luck!