Natural Breeding Tank Setup - Step by Step at Home - Watch fully more about Egg Hatching, Food, Care, Culling at KV Aqua Farm.
Breeding Koi page has a lot of valuable information. You may want to bookmark this page or print it out to have as a handy reference as you will use it often.
From ORNAMENTAL FISH FARMING
The answer is: yes they can! Provide plenty of shallow gravel and plant cover, feed them well, and keep them happy and healthy and your koi fish can spawn in ...
From Greg Jones
This video is about Koi Fish Spawning ~ Laying Eggs ~ Hatching, Koi fry, koi fish eggs, koi fry food, feeding koi fry.
From Twin Cities Adventures
Koi Spawing @ My Koi Pond. Female Chagoi Hirasawa and Male Kohaku SFF. Video made with Aiptek AHD H250.
From Toni Koi & Travel Channel