Bactershield is a revolutionary new way to help maintain fish optimum health. Proven, natural oils and extracts are combined with a patented film forming matrix to help repair and strengthen a fish's natural slime coat and help provide a protective shield around your fish. A fish's slime coat acts as the first line of defense for fish against bacterial and fungal infections.Active Ingredients: Chitosan, Cinnamon Oil, D-Limonene, Geranium Oil, Pine Oil, Rosemary Oil-Non-Antibiotic Treatment-Great for Preventative Treatments-Safe for Plants and Invertebrates-Safe for Fresh and Saltwater Systems-For best results, increase water temperature above 80 degrees F-Remove carbon during treatment, maintain adequate water flow or aeration-Bactershield may cause excessive foam production in protein skimmers or tanks with airstones. Stop the use of a skimmer during treatment if excessive foaming is a concern.-UV Sterilizer can be used during treatment-Always complete a full course of treatment, even if symptoms improve or disappear before the fifth dose-No contraindications: can be used with all of our other products and meds