In case you weren't aware, bettas breathe fresh air and don't need a lot of water. In fact, when they are shipped, they are wrapped in wet newspapers. You just have to keep their skin wet enough so it won't dry out.
The bubble nest means he is ready to breed. The male betta will build the nest, find a suitable female, wrap his body around hers and squeeze her eggs out. He then catches them in his mouth and spits them into the bubble nest, where he will tend to his babies until they are hatched. Once the breeding is finished, the female should be removed or he may harm or even kill her.
It is difficult to successfully breed bettas. The water must be shallow with temperature and light control. I was a fish freak back in the '60s and had a house full of tropical fish. I even had seahorses and had to raise the brine shrimp for them to eat. I tried many times to breed bettas and had one successful nest, but the male got spooked and ate his family.
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In the dead of night they come - Swift - Silent - Savage
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