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I don't consider Omega One to be the best, better than most: yes. But with the artificial colors and ethoxyquin preservative added to the food, not the best.
It is the one of the only foods with no fishmeal. It only has whole shrimp and whole herring and a few more whole fish and salmon skin pigments for color.
NLS uses the entire animals too, without the artificial colors and the ethoxyquin is only on the meals (which are whole animal meals) as required by law.
I agree there is always a chance at introducing pathogens but our peacock eels love them to and don't seem to have any interest in anything else. That's why the birchir gets them mainly because they will eat pretty much anything from what I've seen with mine.