Can you put blue channel catfish in a pond with goldfish and koi?

It is not advisable to put blue channel catfish in a pond with goldfish and koi. There are several reasons why this is not a good idea:

Different water requirements: Blue channel catfish are native to warm water rivers and lakes, while goldfish and koi are native to cooler waters. The ideal temperature range for blue channel catfish is 70-85°F, while goldfish and koi prefer temperatures between 60-75°F. Keeping these fish together in the same pond could stress them out and make them more susceptible to disease.

Different diets: Blue channel catfish are omnivorous and will eat a variety of foods, including insects, worms, small fish, and plants. Goldfish and koi are primarily herbivorous and feed on plants and algae. This difference in diet could lead to competition for food between the fish, and the catfish may end up eating the goldfish and koi.

Predation: Blue channel catfish are predators and may view goldfish and koi as prey. Even if the catfish do not actively hunt the goldfish and koi, they could still accidentally injure or kill them while trying to catch food.

Disease: Blue channel catfish can carry diseases that can be harmful to goldfish and koi. These diseases include columnaris, Ich, and furunculosis. If a catfish introduces a disease into the pond, it could quickly spread to the other fish and cause a serious outbreak.

For these reasons, it is best to keep blue channel catfish, goldfish, and koi in separate ponds.