Absolutely ridiculous! If you want your fish in optimum health and live a longer life, you feed them human grade seafood. All the food you buy at the lfs except for the brands that use human grade seafood like LRS, first will be treated with ethoxyquin. This is a carcinogenic preservative which is sprayed on all the seafood to be used "not for human consumption". Because it is done before any processing, it is not listed on the ingredients list, but look at the ingredients list. It is also loaded with other chemical preservatives and chemical supplements. This seafood is also who knows how old, so I would say any natural nutrition is long gone. Human grade seafood has a best by date to let you know that is the date where the natural nutrients are still optimum. You do not cook the food in any way, like our ocean pets actually eat cooked food in the wild. Sometimes I just have to say "WOW". I've fed human grade seafood to my fish for as long as I've kept fish, over 30 years, and the species I keep live close to their wild lifespan.