What do you do to separate the bettas? Just trying to get ideas. Also you said 20 gallon but could it be 20 gal long to? Also you said separate the males. Do you leave the females in a big sorority?10-20gal tank should be fine depending on the size of the spawn. I use a 10gal half filled for a spawning tank and then I'll fill it up and use it for a grow out tank. If there's a big spawn I'd move them all to a 20gal tank and separate the males out as they start showing aggression.
So when I breed bettas just put them all in a 20 gallon long?I leave my girls together, they usually get along just fine. My first and second spawn were very small, so I only had about 6 males that needed separating. I used breeder baskets and mason jars floating in a heated tank for a while, then separated them out to either split tanks or sold them. If I had a heated room I'd probably have racks with 1gal containers for males and keep all the females in 20gal tanks.
Also, 20gals long is better than a 20gal tall as it provide more swimming space.
What would happen if I got a lot of fry? Like a ton. Still put them in a 20 long?I'd do that when they are about a month or so old, yes. Just remember to keep up on your researching, it took me a few years to finally get a spawn of bettas to adulthood.
So 20 gallon long all the way?You can always upgrade them as they grow but you would be very lucky to get over a hundred fry to the 2 week mark on your first go. My largest spawn is probably about 30-40 strong and they are still in a 10gal till they grow a bit more.