YouTube Videos - Oliver Knott

Hallelujah Mountains

Black Beauty

Iwagumi for beginners

Oliver Knott @ Greenmachine 2009

60cm - NatureSoil Step by Step Layout

Nano Aquarium - Step by Step -

Tips and tricks for handling plants in the aquarium

The easy plant aquarium

The advanced plant aquarium

The art of planted aquarium - Hannover 2008:

WDR 2005 - Tiere suchen ein Zuhause: