I have an empty 20g tall aquarium and was thinking of trying to get a mostly livebearer community tank going if possible. I am thinking of having a mix of guppies, platies, swordtails, and neon tetras. I'm not sure if all of these would be able to work out in a 20g though. I know the livebearers do best with the 1 male to 2 females ratio and the neons would need at least a group of six. Would any of this be possible or too over crowded?