Trout and catfish chows are formulated to grow trout and catfish as large as
possible as quickly as possible in order to get them to your table as
cheaply as possible.

These fish are collected for consumption when they are no more than 2 years
old.

The feeds are formulated for fast growth, NOT the longterm (meaning many
years) health and well being of said fish.

Healthy KOI will live for 40+ years.