Fish foods are designed for these three different feeding levels of fish, although many fish will feed outside their preferred area when hungry. Food is designed to either float for top feeders, sink slowly for mid-feeders, or sink quickly to the bottom for bottom feeders. Some pellet foods float for top feeders, while other types sink quickly for the bottom feeders. All types of fish can benefit from flake foods, including carnivores, herbivores, and omnivores. Tablet Foods Foods that come in tablet form are designed to sink quickly to the bottom for the benefit of bottom feeders.
Most granular foods sink very fast and are best for bottom dwellers.
It is an excellent food source and a treat for fish, it has a long shelf-life, and it doesn't need to be refrigerated. Freeze-dried food retains all of its food values. Tubifex worms, blood worms, krill, and brine shrimp are all freeze-dried. Tubifex worms are found in the muddy sediments of polluted waters. These are perfectly safe to feed to fish.