6 Pack, Mosquito Dunk, A Natural Organic Ingredient Kills Mosquito Larvae That Feeds On It, Contains No Poisons. Will Continue To Kill For 30 Days, Completely Biodegradable, Place 1 Dunk Wherever Water Collects: Flower Pots, Overgrown Ponds, Gutters, Bird Baths, Will Not Harm Fish Or Other Animals, Each Dunk Covers 100 SQFT Of Water Surface Regardless Of Depth.