Nature\'s Blue is the ideal color for decorative ponds as it contrasts perfectly with lush green landscaping. Pond Dye shades and protects your pond from powerful UV rays, while enhancing natural color and beauty. Each gallon treats up to 1 Acre with 4-6\' average depth. Pond Dye can be used all year as part of a proactive pond management approach to keep your pond looking beautiful. Fish, Plant & Wildlife Friendly When used in accordance with label directions Pond Dye Gallons are completely safe for your fish, plants, pets and pond wildlife.