Description Altosid Briquets 30-Day (100 briquets) provides a sustained release mosquito growth regulator that can work for up to 30 days of control in water. It effectively kills mosquito larvae before they developed into harmful adults, spreading a lot of breeding, biting and diseases. Altosid Briquets is great to utilize in sites like water gardens, bird baths, pool covers, rain barrels, industrial or office parks, and other water-holding receptacles. This will not work on adult mosquitoes before treatment. To use, simply administer one briquette in the surface. One briquette will cover 100 square feet area. Product is available in package of 100.Regulatory Disclaimer: Restrictions on sale or use may apply to this item.