Corydoras Duplicareus

Fish being auction are are 4 each, small juveniles .5” in size, and from my Duplicareus corydora tank.  The fish is colony bread in a 20 gallon tank that is heavily planted and has a pool filter sand substrate.  Pictures are of a group of the juvenile cory with my colony of Duplicareus corydoras.  The smaller fish in the picture are the corydoras that are being auctioned.