Durvet AquaVet Black Pond Dye features SUSPEND™ Technology to enhance pond depth with a rich, mirror-like black color. Simply pour or throw in from shore; it stays in suspension longer for lasting depth protection. One liquid gallon treats 1 acre 4–6 feet deep, while one throw pack treats ¼ acre 4–6 feet deep. Ideal for ponds with shallow water, poor color, or muddy and cloudy conditions, it naturally improves the appearance and visual depth of your pond.