Description De Scale It is a powerful liquid designed to dissolve all water scale, lime, rust & other water formed deposits. It is a very fast acting liquid product which can be used on jugs & kettles, Urns , showers, toilets and portable toilets etc. For example in a jug that has built up some sediment and scale. Pour into an empty cool jug  about 100-150 mls and swirl around all areas with a problem for a few minutes. You will see it changing as you do it, pour the concentrate back in the bottle for future use and rinse thoroughly with fresh water, then fill and boil once before use. With a jug the solution can often be used a few times. It is very easy to use and must be washed off thoroughly with water afterwards but it is septic safe. with water, pump or run the water for a few seconds and top up again, then soak for 3-4 hours before pumping some more then drain and rinse well twice before filling with fresh water only.