Krill has proven to be a superior conditioning product for your fish. The high levels of lipids and amino acids combine with the full compliment of vitamins and minerals. This allows fish to prepare their system for the rigors of the breeding process. In doing such, it seems to trigger the breeding instinct in many fish! This is a sinking pellet that your fish will love. This is a 9 mm sinking pellet. Main Ingredients: Fish Meal, Kril Meal, Fish Oil, Wheat, Blood Meal Vitamins & Minerals: Vitamin A, B1, B2, B6, B12, C, D3, E, D3, Folic Acid, Niacin, Riboflavin And Other Vitamins And Minerals. Color Enhancers: Added - Beta Carotenes, Xanthophyll; As Found In Ingredients - Astaxanthin, Cantaxanthin, Capsanthin, Zeaxanthin. Guaranteed Analysis: Crude Protein 40.0% Min., Crude Fat 24% Min., Crude Fiber 3.0% Max., Moisture 8.5% Max., Ash 9.0% Max. The sizes with Jar after the weight come in a jar. The bulk box comes in one bulk bag in the box. All other sizes come in a FDA approved resealable poly nylon bags that keep you food fresh. When you buy the 1 lb. size you will receive two bags with 1/2 lb. of food in each. When you buy the 5 lb. size you will receive 10 bags with 1/2 lb. of food in each. This allows you to open them up as you need them instead of one big bag that will go stale.