Mike
I've just had look in a few of my koi books. THey reccomend the following:
1 Year: 10 - 25cm
2 Years: 25 - 40cm
3 Years. 40 - 60cm
5 Years: 60 - 80cm
This is average suggested growth. I think you differ from this and perhaps this is a topic on it's own? I just bought a 'jumbo' tosai kohako from Japan at 33cm??
