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Many thanks to Pixabay and Shutterstock for use of photos.
Typical environment to find wild  specimens of Betta Splendens

Breeding

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For the first three days after becoming free-swimming the fry will need infusoria and tiny free-living nematodes like Vinegar Eels, Microworms, Banana Worms, and Walter Worms. At one week of age they can start feeding on baby brine shrimp, dried egg yolk and other tiny life forms Keep in breeding tank for 3 to 4 weeks then transfer to a grow out tank. Watch for aggression, as these fry are likely males. Once identified, raise males singly in one gallon jars.
Raising Fry
Once the pair are finished spawning the male will chase the female away. She should be removed at this point as the male will attack her. He’ll spend the next several days cleaning and maintaining eggs and fry in the bubblenest until they are free swimming.
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Many thanks to Pixabay and Shutterstock for use of photos.