After my first spawning attempt and the fry did not make it, my koi spawned in the main pond and traveled thru the filter system and I found many babies deposited in the brick pond.
There are also survivors in the main pond but I will not be able to get to them unless probably Sept/Oct. They have to get much bigger.
But In the toby's I separated I did observe two ginrin showa probably from the one seen on my avaitar pic since he is the only ginrin that I have at this time.
https://youtu.be/hCjy_JmkcQE
Enjoy.