For me Albino aeneus was easiest to breed. If you plan on breeding them you need a tank just for them and a group of at least six Corys. They are hard to tell the gender of with out a group to look at and the breed better in groups. Looking down on them Females are broader through the back and stomach area than Males.
They need extremely clean water and meaty foods to condition them(thawed frozen blood worms, mysis shrimp or
brine shrimp). After feeding them for conditioning for about a week do a large 50% or better
water change with water 3-5 degrees cooler than their tank water. This simulates spring rains and breeding time. They should spawn within 24 hrs. Depending on their age you may have to do this several time.
They may eat their eggs, So it's easier to move all occupants from the tank after the eggs are laid.
Carol