Articles looking at koi development and the appreciation of nishikigoi.
Don't move on a good koi too soon!
Is there a definitive answer?
20 - 55cm, take a look at how this inexpensive koi has developed
See how this tiny sanke begins to transform
Looking at a unique goshiki
Four years worth of development... what can we learn?
See how the simple addition of size has transformed this little kohaku