Blue Ridge Probiotic Plus Fish Food is specially formulated with three key ingredients to boost Koi and Goldfish immunity, prevent disease and infection, and keep fish happy and healthy.  Probiotic Plus contains Primalac probiotic, elevated Vitamin C and montmorillonite clay.  These ingredients are shown to increase immunity to bacterial infection and disease, improve digestion and growth rates, enhance coloring and replace essential minerals and trace elements that are typically filtered out of municipal water sources.