...if it isn't to much more difficult than rearing livebearer fry.
... From what little experience I've had with livebearer fry, it's definitely more difficult. I can ignore livebearer fry and still have some manage to survive to adulthood.
Betta fry require daily 75% water changes beginning after their first week to grow fast and consistently. I've skipped a couple of days on mine recently because finals are coming up next week and I've been studying like a fiend and all stressed out, and I'm already starting to notice some very small runts. The theory is that the fry release hormones into the water that stunts the growth of their siblings, so these have to be removed often. They also have to be fed live foods at least 3 times a day. Usually they won't take any food that doesn't move before the 3rd-4th week. BBS is the best food for them in my opinion, and they love it... this means setting up hatcheries, of course. Microworms are also good for very young fry. As they get older they graduate to grindal worms, white worms, springtails, and/or finely chopped/grated frozen foods. Some recommend feeding boiled egg yolk, but that seems like it would be terrible for water quality!
All you need to raise them in is a large container and a heater. Anything larger than a 20 gallon is recommended as a good size for a growout tank, but obviously the more fry you have the bigger the tank you'll need, and you can VERY EASILY have over 100 in a single spawn. Both of mine had nearly 200 fry to begin with.
Like Ethos said, they should be separated when they become aggressive, usually sometime between 1.5 and 2 months, but in smaller spawns it can happen sooner. Once they have been jarred their water should be changed at least every other day unless the containers are large (1+ gallon,) in which case you can get away with allowing 2 days between water changes. Basically, expect to spend more than 1 hour every single day dealing with them, and expect to empty your wallet buying food, jarring containers, and other supplies.
However, raising them is definitely worth the work. It's very rewarding to see them all grown up
Sooo... let's see that male!
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