hmm okay, just to let you konw, breeding bettas isn't really like breeding platties, there's al ot more involved into this.
You'll need a 10G for beginniners, with a submerible heater and a sponge filter going at about one bubble per second, lots of fake or live plants in a corner for the female to hide in, and a styrofoam cup cut in half for the male to build the nest.
Before you even put them together, they should be conditioned seperately for a min of 2 weeks. Conditioning means feeding htem extra good food and keeping thier water extra clean, this will ensure that both of them will be able to take on the stress of breeding, and that the male will be in opitmal shape to take care of
the fry. You can usually conditoin with frozen food, or live food if you have any.
During the actual breeding, the temp must stay consistently at 80F, temp fluctuations are bad for the eggs and fry becuase they are very fragile, and low temps coudl cause to the eggs not hatching at all.
after the fry hatches, thye'll need to be transfered to a growout tank, which should be about 30-40G in order for htem to grow properly and not be stunted. So, if you dont' really have the equipment and time to feed the fry 3 times a day with live food, maybe do soem more research before jumping inot it?
it'll be much more rewarding