Pond Boss Forums MANAGING AN EXISTING POND Corrective stocking Where have all the Koi gone?

Anybody know when Koi spawn?? Never seen any in my pond yet. I`m guessing they were yearlings 6-8" they grow rapidly!! Algae is definitely down the last few years. They are a playful fish, sometimes 2, or 3 of them just keep following each other around. Never noticed this with other species.