They are about 4 months old. The larger of the two is about 2". Their color is darker due to the black sand bottom. This is a pair from a breeder (Hollywood). I have had blues in the past and these two are by far the best ones I've had. They are in a 29 gal. with a peppered catfish. I am keeping them alone until they grow out. I am doing water changes every 3-4 days and feeding frozen bloodworms,
brine shrimp, flakes, tetra floating sticks, color bits, you name they eat it. I am very pleased with their progress. I have had them for 3 weeks now.