cories are easy to breed, all you need is a seperate filled and cycled tank for the breeding to occur (with a few hidey holes), willing participants (2males 3 females preferably), foam filter (cheapest easiest option), heater, bucket of rainwater, a razor blade and an icecream container and air stone
get the tank set up and the participants settled down with LOTS of bloodworms/live brineshrimp naupili/whiteworms/boiled egg yolk/mozzie larvae etc... (you get the idea, they want to be FAT) and wait for the next storm front to arrive. as soon as the barometric pressure drops do a 50% water change with unheated rainwater, this normally send them into a spawning frenzy. make sure your heater turns on to reheat the water though
eggs are laid near the water line and can be scraped off with the razor blade and put into the icecream container filled with some tank water. float the icecream container in the top of the tank to keep it warm and add the airstone with just enough bubble to keep the water moving without blowing the eggs all over the place. I like to add meth blue here to prevent fungus.
but many people dont with good success. wait a couple of days and you should have many tiny "scooters" in the icecream container. feed them on microworms and fry liquid for the first few days (if you can get it live brineshrimp naupili) and then switch them over to fine flake and pellet foods after about a week or 2 depending on growth rates (if they are in a bigger tank they tend to grow faster but are harder to feed without fouling the water.