ok thanks for all your help
i havent started the pond yet and i wont be untill ive found the best way
i want the koi to be happy as possible so i might think about increasing depth to around 8 foot
so something like 5 foot down and 3 foot high
i will have a good look through the links to the sites you gave me
thanks for your help
planning on doing this in a few months time when ive got as much information as possible
the link for
http://www.koicymru.co.uk/ dont work for me
keeps saying problem loading page