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Maddy, you are starting to be indecisive again. I have read through this thread and others and I don't know if you are getting guppies, tetras, gouramis, etc.???
You ought to think out what you are going to get. What do you have in mind right now?
Well, males are really the only gender you can find. You could put a male and a female, but there couldn't be any other fish in there. And, like I said previously, 6 tetras and ONLY 1 Dwarf Gourami along with ghost shrimp would really be all you should put in your tank.
They don't get along very well with each other and they need some space so if you go with two then you're going to need to get rid of the tetras which I don't think you want to do.