Congratulations on your gorgeous new betta!
There is nothing wrong with line breeding. Not only with fish, but other animals, too. Some of my best horses are line bred and in the future, I have two half siblings (same sire) that I may cross because they are a nice compliment to each other. Done responsibly, it can result in outstanding individuals.
Good luck with him and congrats again on such a pretty new addition!
Check out the eBook Betta Fish Care Made Easy
