I use "the stuff" for many years for the north side of our house wall (house wall facing the Mosel river) which is infested once a year (spring or fall) of "verdigris" / algae (no mildew!). Mellerud Schimmelvernichter it and within minutes is nothing more to see! I did it again 14 days ago and realized that this time, the effect did not occur so quickly. Now I know why: In "shop" Mellerud Schimmelvernichter I was sold, which was established in 2005 (can be identified by the batch number) (!). In the manual you read that the effect is no longer guaranteed 3 years from the production! Thanks Amazon MarketPlace I got today new Schimmelvernichter made 2012 also cheaper than in my "shop"! The effect was perfectly again! So sure to observe the manufacturing date when buying! Another important note: There are of Mellerud and mildew remover. Here the effect is not nearly as fast. You have to do a lot more effort (z. B. with a brush work). When applying Mellerud SCHIMMELVERNICHTER the chlorine in it acts in no time! Indoors after applying necessarily reveal, otherwise you have for a day "pool smell" in the house!
