I think from the photos you have two females.
They both seem to have that pink hue on the belly. It's faded because of the new home and because there are no males present. That is how I have learned to identify females. If you go back to the LFS
and look for a large ram standing Its ground in the tank and flaring when others get close. It's most likely a male. They don't have any red tint on the belly.
Here is a pic of one of my pairs in between spawns. Female is smaller/ Male larger. It's a good pic that showed the belly color. See how the male has a golden belly with no hint of pink. When stressed males tend to fade gray in that area but females will still show a lite pinkish tint or hue even when faded and stressed.
Hope this helps!