I have a pool which stopped being a pool about 3 years ago and I threw some Koi in which have flourished to say the least
I think there are about 3 - 4 generations of Koi in there from the single batch of 20 fish i threw in initially - Also they havent been fed a thing a day in there lives - so this really is a pool built for Koi 
However, Summer is coming and i want to build another koi pond so that my pool can be a pool again ..... so far I know i need to dig a hole to make the pond from there im completely lost - any information, tips, tricks or warnings would be welcomed

However, Summer is coming and i want to build another koi pond so that my pool can be a pool again ..... so far I know i need to dig a hole to make the pond from there im completely lost - any information, tips, tricks or warnings would be welcomed
size ponds here with "how they did it's" you can either direct questions to them in their threads or continue yours with specific questions you have developed. Some of the best are on here.