Tiny Koi Fry = HUGE Pollution! Japanese wisdom.

Most koi fry don't make it — and it's not bad luck, it's bad information. After 30 years of koi fish breeding, I've seen beginners lose entire spawns because nobody told them the truth about what koi fry actually need from Day 1. In this guide I walk you through the complete journey — from koi spawn to Tosai — so you stop guessing and start growing. Whether you're raising koi fry for the first time or trying to figure out why yours aren't growing, this is the no-fluff, no-elitist-nonsense breakdown from someone who's done it the hard way so you don't have to. In this video: ✅ Even Japanese Koi Breeders select their Koi to grown on! They do not try to grow every Koi Fry ✅Water quality — the #1 reason fry fail Koi Fry are 6mm long when hatched and produce tiny amounts of polution and ammionia individually but the culamative effect is HUGE. Even japanese breeders count the koi fry going into a mud pond to avoid over stocking. They know and over stocked pod will give poor results or the death of all the fry. ✅ Multiply the Fry Length by the number of koi Fry and think of the length of a koi to illistrate the amounts of ammonia and polution! ✅ How to Work OUT your filteration needs for your koi fry! 📌 New to the channel? I'm Richard — a passionate koi keeper based in the UK with 30 years of hands-on koi breeding experience. I make practical, budget-friendly guides for everyday pond owners. 👍 If this helped, Please hit the like takes 2 seconds and helps more koi keepers find this video. 🔔 Subscribe so you don't miss the Koi Growth Challenge series. #koi #koifish #koibreeding #koipond #koifry