That's what I figured. The Serpae's are quick, and they aren't especially nice themselves. I have 10 of them though, and they seem to be minding their own business being in a larger number. As far as the gouramis go, I'm contemplating 2 vs 3. I have an Opaline at the moment (he and the tetras are playing nice). I'm wanting to add a Gold and a blue-er Opaline, but could content myself to the opaline and gold. However... with three, there would be more room to spread out the aggression.
Mmm, fish. I had a 75 salt before starting college. Then I ran out of time, missed my fish, and am taking up freshwater again.