here is where I struggled.
"On May 16, 2021 I pulled the shell they spawned on, and suspended in a Lee’s large specimen container, hung inside the tank with an air bubbler. The fry hatched and were free-swimming by May 23, 2021."
I pulled the clay pot they spawned on, suspended in a separate tank once and moved the eggs in a Top Fin 3 Way Aquarium Breeder with an air bubbler at a different time. some of them hatched and were free-swimming, but they were all disappeared no more than two weeks.