I had a full pond spawn Saturday morning and after spending several hours cleaning up the mess, I checked the pond at Noon and had another full spawn. The culprits appear to be a Kohaku, Sanke and Bekko. There are about 8 males that participated in the event.
I transferred the spawning ropes to an aquarium and they hatched today. Attached is a photo of the 1/2 day old fry. They still have their egg sacs. Since there are several thousand, it's quite the sight.