Infusoria should only be fed to your fry until they are big enough to feed on Grindals, Walter worms, banana worms, vinegar eels, or baby brine shrimp. We have most of these available as well. These little guys are some of the most advanced protazoans, and a very nutritious first live food for many types of fry. You will receive a 2 oz bottle (like a 5 hour energy bottle of live paramecium, some food mix to get the culture off to a good start, and detailed instructions for care, to make sure your culture blooms quickly to keep your babies fed!