So I have a heavily decorated/planted 29 gallon tank. I have a banjo catfish, kuhli loach, Clown pleco, and 3 green barbs. I have a male betta in a 3 gallon tank. Do you think he'd be okay if I put him in the 29 gallon?
most likely no, those barbs are still fin nippers. If i recall correctly, i tried it a long time ago and my barbs did a good amount of damage to my betta.