You already have a gourami. They are labrynth fish. They defend there territories very aggressively against other fish specifically other labrynth fish. The gourami you have might behave now but if you put another gourami in the tank or a betta they will pick on each other until one is dead. So do not do any gourami or betta.
I would suggest a Blue Guppy. Electric blue ram would work too. Maybe a Blue Killifish, they are solitary... Can't think of any more off the top of my head.
Ah, thanks. I did not know that gouramis were that aggressive. 1 more reason to not get another one. Betta never were really an option, I don't have luck with them.
I remember paying $15 for a pair of them about 3 yrs ago...Might be able to get just a male for cheaper than that if your store can get them. It never hurts to ask them if they can get them in stock.
Your talking about the apistogramma galaxis right? If I can find them and like them and think I can care for them, then I'll see if I can afford them.
If you don't mind a little yellow/orange with your blue, what about Bosemani rainbows?
No schoolers. I have actually looked into them, but they aren't really to my taste, at least, not enough to counter the cons of being schoolers and having yellow in them (i'm not a fan of yellow fish).