EnviroSafe Mosquito Drops is a unique liquid for mosquito control. Completely non-toxic and environmentally friendly, it works by forming a very thin silicone film on the water surface, eradicating immature mosquito stages and disrupting the mosquito life cycle. Mosquito Drops to use in all areas where standing water occurs: Ponds, gutters, blocked drains, troughs, septic tanks and even old tyres.