Our pond is silted up and I have therefore decided to purchase the Teichschlammentferners. Immediately after use the pond water was murky, but it has the fish did not mind. After about 1-2 weeks, sludge layer had somewhat reduced, that was all then (insert is now 2 months ago). The use of such an agent should think twice - the mechanical sludge removal, I think clearly effektiever, I expected more from the center.
