I have bought items at Dehner zoo and it funtioniert supper the water is flowing from the top very quiet I did it for my betta splendens (Fighting Fish) breeding hergenommen it does not even have the shame nest made kaput and for breeding, it is also great as it was not the baby of the filter cartridge I einzicht give as 5Sterne this product I advise everyone to breed it for breeding or wants to use that's just suppppppper