barbus filamentosa are a great fish, and the ones in that picture are gorgeous they usually dont have so much yellow on them.
However, Filament Barbs are rare in the trade and like company. Odie has an overstocked cichlid tank. Five or six 6" barbs wont help, they will die and those are great barbs that could have gone to someone that would take care of them and possibly breed them.
My suggestion to Odie is NOT to have dither fish. Understocked tanks = healthier and happy fish, which = prettier colors and more interesting behavior.