Each Dunk treats up to 100 square feet of surface water regardless of depth. Perfect for Koi Ponds, Hydroponic systems, animal watering troughs, rain barrels, birdbaths, stock tanks, planter saucers, or any other standing water.
It is the only mosquito product that uses BTI, a bacteria deadly to mosquito larvae but harmless to other living things. … Mosquito Dunks are safe to use around people, pets, birds, wildlife and fish. Mosquito Dunks have been registered by the EPA for use in animal watering troughs and fish habitats.