Water - let us not forget that water is also is the breeding habitat for the worlds most efficient KILLERS . 1.2 Million people die each year from deadly mosquito Species (Anopheles, Culex, A. Aegypti) spreading Malaria, Dengue, Zika It only takes stagnant water in a tropical environment for each female to lay 150-250 eggs that need algae, microscopic matter to grow and feed, shedding their skins 4 times before they reach pupa stage and swarm again by the millions Resistance build up to chemicals has been documented for many years. I am pleased that we have a complex but natural mineral mix that takes care of larvae. A child can spray our 1 Liter diluted spray, no fear of toxic fumes.