Bonide Mosquito Beater Water Soluble Pouches 24 - 0.2 Oz. Pouches 24 pack of 0.2 oz., Mosquito Beater WSP This is a new, faster acting method of delivering BT to control mosquito larvae in standing water Each pouch covers 50 square feet, and lasts for 2 weeks Dissolves on contact to quickly release active ingredients Use in water gardens, bird baths, tree holes, unused swimming pools, and other locations around the home