My GT only likes to pick on my convicts and it ends in a stale mate seeing as the pair of cons combined is only 3" and he is pushing 4"...cons back up what they put out I've seen them tussle before and the female con got the best of him and he backed off. I agree the danios might work now...but when that GT gets older they will be feeders. Find a really nice Honduran Red Point with nice streamers and colors then you have color, something cool to look at (better than a danio), and a good dither for your GT...And I think its cool how cons just seem to go crazy after a human finger all the shaking you'd think they were falling apart.