Have (4000 ltr. Pond ca) used in my Teichschlammentferner. It was also evident after 4 days only a very small effect, although I have used to guide the double amount to strong contamination (algae, algae). Furthermore, I will the pond periodically to continue to reigigen herkömmiche Art. Sludge has a much better success with me. Get the Teichschlammentferner no longer buy.
