I know nothing about breeding bettas. I just bought my very first one! My concern would be outcome of the babies. I'm sure a lot of people have thought about breeding and then selling them but I imagine you cannot just walk into any pet store and say "Wanna buy some Bettas?". Most places have accounts already set up with reputable breeders (I hope reputable!) What if you can't sell them? How many fry will be produced in one hatching? 10, 100, 1000? Even if it's only 10, what are you going to do with all those fish? Especially if you can't sell them. Is it worth taking the change of loosing one of your breeder fish to have babies? I know everyone needs to start somewhere but this is the same as what they call "backyard" breeding with horses, dogs and cats. Breeding with no regard for genetics, health or what kind of home the offspring will go to. I imagine a mature and responsible person would ask themselves why they intend on breeding. To improve the line/colors? To make a profit? Or "just for the fun of it to see what happens"? (The later being the least respected of all choices.) I am not coming down on anyone but I think the decision to breed should go beyond just equipment set-up and risk to the breeder fish.