Pond Dye limits sunlight penetration at the bottom of the pond Creates a dark mirrored reflection of surroundings Concentrated Quart treats like Gallon Dye- 1 Quart Treats 1 acre Safe for use in fish pond - 100 percent safe for fish, wildlife, and humans Can be used for livestock or swimming same day as pond dye application Reflective Black Pond Dye creates a dark mirrored reflection of surroundings. Natural Waterscapes Pond and Lake Dye comes in a concentrated quart. This treats a 1 acre pond, up to 6 feet deep- double dosing for 12' depth. Repeat application monthly for best results. For ponds with heavy flow or during periods of heavy rain, treatment frequency may need to be increased. Pond Dye limits sunlight penetration to the bottom of the pond. Combining Pond Dye, with Muck Remover, Pond Cleanse, Phosphate Eliminator and Bottom Aeration provides a natural and proactive approach to pond management. This approach targets the root cause of many pond problems. Pond Dye should be applied all months of the year when the pond is not frozen. For southern states that have no freeze over period, treat all year long. For northern ponds, begin dye treatments as soon as ice begins to melt, and continue applying until the pond freezes again. Our pond dye is a concentrate, however, no mixing is necessary. Simply pour dye at multiple points around the pond. Dye will distribute through the pond within 24 hours.