Have you ever heard of the Gerd Box? This, and many other practical gadgets for the most beautiful hobby in the world, go back to the ideas, developments, and inspired wizardry of a true tinkerer. AMAZONAS had many questions for Gerd Arndt, the "chief gadgeteer" of the German hobby scene. Read more in "Aquarium Wizard: Interview with Gerd Arndt, 'Chief Gadgeteer.'"