As Akasha said, this won't work, and for a couple of reasons.
First, you have two different species, the Black Ruby Barb. Pethia nigrofasciata, and the Tiger Barb (original and man-made green variety is the same species), Puntius anchisporus. Both (like all barbs which are cyprinids) are shoaling fish, so each species must have a group of its own. This is especially true of the Tiger, as having minimum 8 (regular and green is fine) in a 30 gallon/113 litre tank is the minimum, and they would be better with 10-12. This assumes on their own...I've no idea of your aquarium size; any other fish means a larger tank.
The Black Ruby also needs a group, and here I would suggest no less than 8-9, with a mix of male/female roughly half each. While this is not anywhere near as aggressive as the Tiger, it is still a barb and thus active and rather boisterous, and with such fish it is always safer to have more of them. I have a group of 19 (six of these are fry that have appeared and survived) with six males and 13 females, more of the latter because interestingly all the fry have been female. But you need a decent number of males because they interact (regardless of the females) and this is one of the joys of keeping this beautiful species. To see two males, with a third sometimes attempting to join in, spinning around so fast they are a blur is a joy of the hobby. And they drive the females, so more females than males is a good idea anyway.
I have mine in a 90g with a group (8) of Congo Tetra. I was prepared to move these out into the 115g should the barbs become troublesome, but they have been together now for two years and not once has a barb even looked at the flowing fins of the Congo to nip. That would never occur with Tiger Barb, which I had many years ago. The female Black Ruby is very similar in pattern and colour to the Tiger, so with a decent-sized group of Black Rubys, you have the best of both worlds...the appearance of both species, with none of the aggressive problems. Though the latter does depend a lot on tank size and numbers, and other tankmates. Using your number of nine, if all Black Rubys with a mix of gender, you would have a very interesting and beautiful aquarium. It needs to be at least 3 feet (90cm) in length, as these are very active swimmers, and fast.
Akasha mentioned issues with eating plants, and I would surmise that this may be due to the group size. I have never seen this, and I've had two different groups of this species over the years, but they do pick plant leaves looking for food, and I can see how this might turn to leaf destruction depending upon the plant species and the tank size and especially numbers in the shoal. My Botia kubotai loaches in this same tank have eaten holes in the swordplant.
Byron.
