Black DyeMond, 1 Quart Due to an overwhleming demand we have created a new formulation of pond dye, Black DyeMond. Black DyeMond will give your pond a rich appearance and provide beautiful reflections. For an even more Mystic looking pond, use a 50/50 mix of Nature's Blue and Black DyeMond! Great for blocking the sunlight too! Black DyeMond is applied just like Nature's Blue and is fish safe. No water use restrictions. One quart treats up to one surface acre 4' - 6' deep.