After I had already ordered these algae remover on a shopping channel and was completely satisfied, I will order again. 3 years ago, we thus get a total "is greened" Screening fence (12 plates) so clean - we are not even believed. Then painted (with wood) - on the fence is not yet turn again. Have this year again some sprayed and again a good result. I hope Nell Ultra remains - whatever the provider - in the offer.
