I similar to George, fed Aquamax and its predecessor (Purina Trout Chow) to a mixed fish community for 10-12 years. I never had problems with the catfish dying from fatty livers even though they may have had fatty livers. Free roaming fish may (?) get enough wild food items to somewhat balance out the dietary problems from the high protein and high fat food. Kind of like people, many are overweight from too much high fat foods but not a lot of them are dying of fatty livers. Now clogged arteries, that is another story.
