Bio-adhesive supplement repairs and strengthens•the fish's natural slime coat which protects•against bacterial and fungal infections 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 Special note on Bactershield Ñ Do not exceed recommended dosage. This product may slow biological filtration. During use some sessile invertebrates will retract for the first several hours. This condition will be temporary and may last for up to 24 hours. Tested on Stone Polyp, Brain Favites, Mushroom (Rhodactis), Ricordea Sp., Favia Fragum, Plate Coral Sp., Tubastraea Sp., Knobby Leather Sp., Acropora Sp., Finger Coral (Porites) coral species. All corals and polyps may not react the same way as the test species. Follow dosage directions as detailed on the product packaging.