In this section we offer both useful information and quality products to help keep your koi, as well as your pond healthy. Koi today are not the same tough fish as their ancestor, the magoi carp. The magoi carp is an extremely resilient fish. It can survive in very poor water conditions and host a serious parasite population without getting sick.

Because our modern day koi have been selectively inbred to produce the beautiful colors and shapes that we all love, they have lost much of their ability to endure harsh treatment. Still, today’s koi seldom get sick and or die without a reason.

The following chart shows the most common reasons why koi get sick and die.