"k conover" wrote in message
...
All I know is, 1,000 gallons is too small for Koi...
Kirsten
snip

A generally excepted ratio of Koi to Water is 1,000 gallons for the first
Koi and 100 gallons for each additional Koi. So 4 Koi, for example, should
be in 1300 gallons of water. The key thing to remember here, is that this is
a rule thumb, and nothing more.

BV.