summit Mosquito Dunks 10 Packs of 20 Dunks (200 total)

200 total dunks. Each briquette treats up to 100 sq ft of waterActive Ingredient: Bacillus thuringiensis subspecies israelensis solids, spores and insecticidal toxins, 10.31%Target pests: Mosquitoes and Psychodid Flies, and their larvaeFor use in: bird baths, old automobile tires, rain barrels, ponds, abandoned or unused swimming pools (particularly above ground types), ditches, tree holes, roof gutters for collecting rainwater, flower pots, animal watering troughs, waste water treatment plants, elevator shafts, basements that flood, sump pumps and any drainage areas within buildings