| Luke's answer, albeit a little nebulous, was very correct in context. The high protein and fat content of catfish food for koi may benefit a koi diet under certain circumstances, and be detrimental to koi under other circumstances. Water temperature comes immediately to mind, as a factor. A feeding trial might just be the answer to your query. Feed a group nothing but catfish food, another group with supplemented catfish food and another (control group) no catfish food. Take notes on disease occurrences, growth and color. At the end of the trial dissect 15% of the koi from each group and compare major organs. Especially the liver. I would suspect a certain amount of enlarged and fatty livers in the catfish feed groups. |