<p>Biological mosquito control for standing water. Mosquito Dunks are a safe, EPA-approved solution for treating stagnant water during extended outages when water storage and sanitation are critical.</p><p>Each 30-day briquette treats up to 100 sq ft of standing water without synthetic chemicals. Uses naturally occurring Bacillus thuringiensis israelensis (Bti) bacteria—proven safe for 30+ years.</p><p><strong>Perfect for:</strong> Water storage containers, birdbaths, rain barrels, and any standing water</p><p><strong>Contents:</strong> 20 briquettes per pack</p><p><a href="https://suppliesarelimited.com/pages/recommended-resources">View on our Resources page to order</a></p><p><em>We earn a commission on purchases through our affiliate link. We only recommend products we genuinely use and trust.</em></p>