I decided to throw out the Ovaprim and just pair them up according to the prime breeding months (May, June, July) on the full moon week. The Hasegawa female had a slight bulge on its stomach, but it was not extremely fat to the point where the egg sack protrudes out from the vent. It was on the slim side, but it dropped a lot of eggs.
They spawned in the morning in a 600 gal tank, I transferred the eggs to a 300 gal tank after they were done. Latter in the evening, I took an ammonia and nitrite reading and was surprised to see none, all the sperm and foam was left in the 600 gal spawn tank.
I redesigned the filter set up on my 300 gal tank. I made another one inch hole, so I can run a 900 gal per hour pump where as previously, I could only run a 600 gal pump. I will place sponge filters on the drain pipes to keep the fry out. This should solve a major problem. Furthermore, I made the return come down to the bottom with air bubbles coming out from the ventril hole on top. I was worried that the fry would get hurt if I just let the return shoot back in from the top.
I placed an order for 5 lbs of decapsulated brine shrimp eggs, it will arrive in three days. All I need is enough to get them past one month, then I can mash up some powdered koi food, spirulina and cooked pearl barely.