I have two saltwater fish tanks, and one of the foods I like to feed my saltwater fish is Sally's Frozen Premium Brine Shrimp. It is good for fresh and saltwater fish, but I usually just feed my saltwater fish this food. The freshwater fish in my one freshwater tank get another type of food.
This brine shrimp comes in cubes that are encased in blister packs. I usually take a cup of aquarium water and break up a cube in it, and then pour that into the tank. You can just drop a cube into the tank too, but I like to break it up for the fish. My fish seem to really like it. I've never had a problem with getting them to eat this brand. This food must be kept frozen, and should not be refrozen if it happens to thaw. I think there is a problem with bacteria building up if this happens. I just keep it in the freezer and feed my fish a cube twice a day. It is a great way to feed them a high quality food which seems to be keeping them healthy.
If you have fresh or saltwater fish and are not feeding them this food, I would recommend that you give it a try. I think that your fish will enjoy it.