Will mosquito dunks in a pond kill tadpoles?

Mosquito dunks contain a bacterium called Bacillus thuringiensis israelensis (BTI), which specifically targets mosquito larvae and is generally safe for other wildlife, including tadpoles. While BTI is designed to be non-toxic to most aquatic organisms, there may be some risk to sensitive species in high concentrations. However, in typical use, mosquito dunks should not harm tadpoles significantly. Always follow label instructions to minimize any potential impact on non-target species.