If they're the same size as the Hikari pellets, 5-6 2x a day is wayyyy too much. Even 5-6 once a day is still a bit much. I don't feed pellets as often anymore but when I did, I would give them 2-3 a day. Somedays I would fast them for a few days too.

He doesn't need light at night. Bettas like to sleep too!

Your new CT is very beautiful!