wrote in message
ups.com...
When there is amonia build up, I wonder how much is due to excess fish
food? Some people like to feed the koi, but I have had 3 ponds and have
never purchased any fish food. There is obviously enough natural food
for them to eat and they seem fat and happy.

Dave

http://members.tripod.com/~VideoDave/pool/pool.html

Absolutely. Most times, especially if you don't have a lot of fish, there
should be plenty for them to eat. However, chances are, they are not
getting all of the nutrients they need, and so you should suppliment their
diet. And that, of course, is another entirely different can of worms,
altogether (pun intended).