Summit® Mosquito Dunks®
mosquito larvae for 30 days or longer. Made with a natural organic
ingredient, contains no poisonous chemicals. Harmless to other living
things. Simply leave a floating Mosquito Dunk® in each place water
collects around your home. Perfect for Koi ponds, hydroponic systems,
rain barrels, stock tanks, etc. Each Dunk® will take care of up to 100sq
ft of water surface regardless of depth.