Munns water savers will not alter the p.H. of your soil or harm earthworms, unlike other wetting agents. Munns wetting agents and water saving products are 100% organic. Ideal for environmentally concerned home gardeners wanting to minimise water usage and reduce fertiliser and chemical pollution to our streams and oceans. By reducing or eliminating surface run-off, Munns fertilisers last longer so you do not need to apply excessive amounts to keep your lawn and garden green and healthy.