Aquascape Black Pond Dye safely tints pond water, helping to shade the pond and creating a shimmering effect across the water. Our Black Pond Dye also contains humic acid and enzymes that help to balance the pond ecosystem, significantly reducing maintenance throughout the year. One dosage will last up to six weeks. The easy-to-use pump top accurately measures 100 gallons of treatment per pump and the full bottle treats 5,000 gallons of water.