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Frozen foods Aquarium stores sell a wide variety of frozen fish food items ranging from zooplankton to whole fish. Though less expensive than live foods, frozen foods are just as readily accepted by aquarium fish. This makes them valuable for feeding fussy or predatory fish. Frozen fish food is also less likely to carry pathogens than live fish food, and some manufacturers irradiate the food to make sure that it is completely safe. Because it is unprocessed, frozen fish food is nutritionally excellent and also tends to be high in fiber. Not one fish food should be used exclusively, though, and it is a good idea to alternate between foods through the week: mysis one day, chopped mussel the next and so on. Frozen food blends tailored for community fish, cichlid fish, saltwaterfish and so on sidestep this problem by including a carefully chosen mix of foods, sometimes with added green foods and vitamins.
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