NT Labs Pro-f Probiotic Tropical Fish Food For Freshwater Fish (Contain Viable Probiotic Cultures) Granules For Tropical Aquariums, Supports Immune System, Highly Nutritious Spirulina (120g)INCREASES DIGESTION : Pro f Probiotic Tropical fish food is a premium feed for freshwater tropical fish. Containing at least 5 million viable probiotic cultures per gram, this granular fish feed ensures your fish absorb more of the nutrients, resulting in less waste and improved water quality. IMMUNE SYSTEM SUPPORT : Contains Stimmune which helps to support a fishs immune system which helps to improve and increase immunity. Keeping your fish healthy