Aquarium using fluid between tubular walls - pumps fluid and has centre space illuminated

摘要

The transparent fluid is contained in a annular space and is pumped round by a pump and distributed by tubes which form an angle of 90 Deg. An expansion chamber is provided and has on top a ball valve and funnel for refilling the aquarium and an air filter. The end of the cylinder is made water-tight by caps. The space in the centre of the tube contains one or several animated objects and can be transparent, translucent, or opaque. It can be level or inclined and is illuminated.