IMO guppies are fine on their own. If you are keeping more than one, and both are male to prevent breeding, only having two can be an issue because of aggression. Honestly with this stocking I would skip guppies entirely and just go with the DG and corys, although I personally keep them in bigger tanks. I would look into sparkling gouramis instead. You can have more than one, just make sure to densely plant the tank to prevent aggression.PheonixKingZ said:Guppies need to be on groups of 2 or more.