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Learn as much as possible. Set up your permanent tanks. Obtain a breeding pair.
When attempting to breed any animal, it is important to know as much as you can about the species.  Research betta care and breeding. There are many great websites and books. More than 600 eggs can come from a single spawn, meaning that you could end up caring for more than 500 betta fish if most survive! You need to know beforehand what you want to get out of the experience.  Are you interested in genetics, breeding for show, or supplying a local pet store? Or are you simply in love with bettas and want to take your hobby to the next level? Breeding for show or supply is a big undertaking that will require a large investment of time, space, and money.  Due to the high start-up and supply costs, it is very difficult to make a profit breeding bettas, so this should not be your goal for some time. When you are ready to try breeding, you need to first prepare to bring your breeding pair home. Set up two tanks as shown in Set Up a Betta Tank. Be sure to cycle the water in both tanks before bringing home any fish. Bettas breed best when they are young, so you will have the most success if you find a reputable breeder either online or in your area to purchase a pair from. If you are able to find a breeder in your area, they can also be an invaluable source of information. Make sure the male and female are about the same size, and consider getting two pairs in case the first pairing doesn't work out.  Most pet store bettas are too old to breed and their genetic background is usually unknown, but they can be a cheaper way to get started breeding and are more readily available than breeder fish. If you choose to breed pet store fish, be aware that you may be unable to find buyers or homes for your fry, as most pet stores will not buy them. Because you don't know what genetic traits you are mixing, you could end up with sickly or undesirable fry.