i have 3 male dwarves in a 22 gallon. 1 flame, 1 powder blue & 1 neon. my neon is a real pig! he's always seen furiously picking at food even at the bottom. the 3 gets along real well, they often swim together like some schooling fish
i bought a cosby (opaline) gourami last week too but it died (i think from stress) 3 days ago