As I recall from my organic chemistry, (could not find my organic chem book) most fats and oils contain little if any nitrogen or phosphorus. Most fats are composed of fatty acids (carbon hydrogen & oxygen). The oil from the pellets has calories but probably little plant nutrient value (nitrogen and phosphorus). Higher quality blend of Aquamax (bluebag) is 41% protein and 12% fat. Amount of oil that comes off the pellets varies with each batch of pellets depending on ingredients used each time; it does vary depending on availability of products at the mfg mill. Since the fish food contains higher amounts of protein it could result in a few more nutrients (from manure) getting into the water. But supposedly, higher quality feeds are more digestable by the fish and less waste and undigestable material is produced by the fish than with cheaper feeds. Did I answer your question?


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