Part - 2 Betta Breeding

Let them settle in. It's best to have your bettas for a few months before you start breeding to allow them to adapt to their environment. Remember, however, that males breed best when they are no more than 14 months old. Plan to breed them when you have a long, uninterrupted stretch of free time.

Once you introduce the male and female, you will need to devote at least a few hours every single day for more than 2 months to caring for the pair and their young. Make sure you don't have any vacations, business trips, or high-stress events coming up.

Set up your breeding tank. The breeding tank should be 5–10 gallons (18.9–37.9 L) and be equipped with a removable divider, a few hiding places, an adjustable filter (such as a sponge filter with a gang valve), and a heater set to around 80 °F (27 °C). Never add gravel or other substrate to the breeding tank because the eggs will get lost when they fall to the bottom. Only fill this tank with 5"-6" of water, and set it up where there are few distractions, such as other fish, bright colors, and human activity.

Start feeding live food when you are ready to breed them. Live brine shrimp or bloodworms are the best bet, but other worms, crickets, roaches, and other insects (cut up) will also work. It's a good idea to raise these yourself or purchase them from a pet store or breeder to avoid the bacteria, dirt, and chemicals that wild insects could be carrying. If live food is unavailable, you can also try frozen or freeze-dried brine shrimp and bloodworms.

Begin raising fry food. Betta fry are very small, and only eat live food, so you will need a supply of very very small live food to feed them when they are ready. Start now to be sure you have a good supply in a few weeks when you need it. Microworms are probably the best food, but some breeders prefer infusoria or vinegar eels. Baby brine shrimp can also be fed, but only in moderation alongside another food source, as too much may cause swim bladder disorder.

Introduce the pair. When the live food cultures are going strong and the breeding pair has been eating live food for a week or two, you are ready to introduce your bettas. Move the male and female so they can see one another clearly, but are separated. You can either put their tanks next to each other, or introduce them to opposite sides of the tank divider in the breeding tank. It is essential that they are able to see each other before being put together to minimize the risk of serious injury.

Some breeders release males into an undivided breeding tank and use a clear plastic cup or oil lamp chimney to introduce the female. When using this method, the female should only be introduced for a few hours each day, as she is being contained in a very small space. Let them watch one another for a few days.
Some breeders then separate the pair for a few days before introducing them for a few more days, then proceeding to the next step.

Observe their behavior. Watch the bettas to see if they seem interested in one another. The male will swim around, displaying his fins, flaring and generally showing off. The female will display vertical bars on her body and will angle her head down submissively. Some aggressive displays are normal, but if they are flaring and trying to attack one another through the divider, do not put them together. Instead, it may be best to separate them and try again later, or try a different pair of betta. Sometimes the betta fish fight so it would be better if you take a little time to watch and wait.