Understand the only part of this that I have a good handle on is growing fish fast. Published studies that I have read say that 16% fat is optimal for growth. Observations that I have made bear that out. Protein's primary function is building and repairing muscle and tissue. With that said I think that protein quality is key in achieving phenomenal fish growth. The most natural and best that I have found is whole fish meal (92% digestible protein). The parts meals (fish, shrimp, chicken, pork etc.) are half the price of whole fish meal however their protein is only 20%-25% digestible. Soybean meal has 100% digestible protein however it damages the fish's intestines leading to much slower growth rates. It will be interesting to see if the use of whole fish meal makes a difference in the fish's growth rate.
*EDIT* I once saw the point made that shoe leather had a high enough protein percentage to use in dog food however the protein quality is so poor the dog would benefit very little from it.
Last edited by Fish Food; 10/30/17 12:11 AM.
