Pond Dye Plus combines our color-enhancing pond dyes with water-clarifying Liquid PondClear beneficial bacteria for the ultimate 1-2 punch. Beautify and protect your pond from troublesome UV sunlight with long-lasting natural shades of pond dye while eliminating suspended organic debris that contributes to cloudy water, muck and sludge accumulation, and weed growth. Leaving you with clean and clear pond water, no scum in sight. Shading your pond and adding beneficial bacteria will improve the overall ecosystem and help in the defense of common pond problems. Limiting the light from the sun will slow the growth of aquatic weeds and help control algae, but Pond Dye Plus is not an algaecide. Pond Dye Plus maintains a blue tint that is ideal for shading and protecting your pond without making drastic changes to its natural appearance. Tint provides protection to pond fish, especially from predators like blue herons. for use in ponds with fountains and aeration equipment. The Best of Both Worlds One gallon of Pond Dye Plus still treats like a gallon of other leading pond dyes, even with our water clarity enhancing Liquid PondClear beneficial bacteria mixed in. Each color of Pond Dye Plus provides the same reliable protection and can be selected based on your personal color preference. Twilight Blue Pond Dye Plus maintains a neutral blackish-blue tint that is ideal for shading and protecting your pond without making drastic changes to the natural pond appearance. Fish, Plant & Wildlife Friendly When used in accordance with label directions, Pond Dye Plus is completely safe for your fish, plants, pets, and pond wildlife. Will not harm frogs, ducks, turtles, or other aquatic creatures that live in your outdoor pond or lake. Not recommended for small koi ponds or small water features.