1.5 L of the tiniest live food for the tiniest of fry. Perfect for Tetra, Bettas, Killifish, Gouramis and all tiny fry. Easy to culture (even I can do it). Prolific and fast growing. The bottle for sale will contain thousands of these tiny creatures. Sorry about the pic, but it's tough to focus because of the tiny size of these creatures. All the fuzzy white stuff in the pic is the actual organisms.