Safe for fish ponds and animal troughs also, Kills mosquito larvae in standing water, Use in flower pots tree holes bird baths water gardens rain barrels roof gutters unused swimming pools, Keeps working for 30 days or more, Safe for fish ponds and animal troughs, Use one (1) mosquito dunk for up to 100 square feet of water surface regardless of depth, Bacillus Thuringiensis Sub-Species Israelensis Primary Powder(7000 Aedes Aegypti (Aa) International Toxic Units (Itu) Per Milligram Primary Powder (Dry Weight Basis), Dimensions (L x W x H):6 x 5, 5 x 0, 8 SKU: BCI14042