Hi my name is Steve ,living in the south east of England Uk , ive had a pond for about 10 years,its roughly 3 mtrs x 2 mts probabably just over a mtr deep,have roughly 20 fish ,8 common/mirror carp ,8 koi and 4 goldfish ,the fish range from 5lbsish in size down to a couple of ounces,reeds at both ends and a lily in the middle.