Hamburguer Matten Filter (HMF) ou Filtro de espuma | The "Hamburger Matten Filter" (HMF) is one of the most efficient mechanical and biological filtration systems, and one that uses less energy. It
Building a Hamburger Matten Filter (HMF) for an Aquarium : 4 Steps - Instructables
How to Install Corner Hamburger Mattenfilter (HMF) in Aquarium - YouTube
Building a Hamburger Matten Filter (HMF) for an Aquarium : 4 Steps - Instructables