FritzPond Blue Dye turns pond water a beautiful, vibrant blue. Blue water also helps to conceal fish from predatory birds and wildlife, such as raccoons. FritzPond Blue Dye is compatible with FritzZyme® biological products and all other FritzPond conditioners and clarifiers. Shades pond from harmful UV rays Conceals fish from predatory birds Concentrated, easy-to-use formula Safe for all fish, plants and wildlife Directions & Dosage Add 1 cap (1 tsp/5 ml) per 40 U.S. gallons (151 L) Use a bucket or container to take one gallon of water from pond. Shake product well, and add 1 capful (5 ml) per 40 gallons of pond capacity to bucket. Gently stir and pour this mixture into pond around the edge. Wait for the blue colorant to disperse. Treat again if a darker coloration is desired. When color fades over time, re-treat. NOTE: This product may stain porous surfaces, concrete and water features.