Absolutely nothing. The tank they are in has a lot of algae and plants and I do few water changes. It's a very stable tank. There are only a few snails and a few shrimp in with them. I moved the adults into my new 29 gallon that finally cycled. I hope they keep breeding.
Yes, I just picked up that sword. And the cory fry are about a week old now. I'm so excited they are so cute. I'll move them to the big tank when they get bigger. I was so afraid the mom and dad would eat them..