Hello Maurice, good to hear from you again. Working with so many breeding pairs seems a tremendous task. I wish you all the best, you have worked so hard this year!
But common, you shouldn't complain about your temperature
What do you mean with "hot hot", just 25 celsius degrees?
Please, forgive me but it sounds funny ... this morning I have spent almost 4 hours culling in the greenhouse (door and windows fully opened all the time, shadow clothing almost all over) at 48 celsius degrees

, the water temp in the pools reaching up to 34. Of course the fry are now two months old, that is the great advantage. I guess you will start spawning your Koi sooner next year.
Anyway, you are wellcome to come over and teach me how to cull, in exchange you'll get some proper training to handle real hot weather
Best wishes,
Diego
PS are you going to the BKKS Koi Show this year?