Great!
So, can I get away with?
6 Tiger Barbs
6 Green Tiger Barbs
2 Firemouth Cichlids
3 Bottom feeders (3"ish)
How are the two groups Tiger Barbs likely to react to each other?
That's surprising that the pleco got attacked! I was sure plecos would be fine.
The two tiger barb groups will be fine. Just because they are a different color, doesn't mean they will be attacking each other.
There is no such thing as rascist fish