The "Hamburg" Matten Filter was as the name suggests first developed in Hamburg, Germany, probably around the late 1950's.
The design is in itself very simple with the prime ingredients being a piece of inert open cell foam having a pore size of between 10 and 40 PPI (Pore Per Inch). A air driven uplift tube and some 1" (25mm) spacer.
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Born in Birmingham in 1946.
A toolmaker by trade, and self confessed Corydoras nut by admission
I started keeping tropical fish in 1970 in a small 18 inch aquarium, it was not very long before I had two, four foots and two three foots set up in the spare room. Overthe first two or three years I kept and bred many of the popular fish groups. Starting with South American Cichlids, graduating through Barbs, Anabantids and Characins. Although I had kept several species of catfish during this period it wasn't until early in 1973 that I took an active interest in them. From when I bred my first species of Corydoras in 1974 I have been well and truly hooked.
My first fish house took shape in 1977 and was a sectioned off part of my garage, which housed 36 - 18 x 18 x 12 inch tanks. It was then that I started seriously breeding Corydoras a project which still continues to this day in what is now my third fish house.