This stunningly attractive aquarium is strong and safe, and requires virtually no maintenance. A talking point in any home or office! The tropical biOrb 30 is ideal for small tropical fish e.g. danios, barb and small tetras. The LED unit is concealed in the aquarium lid and only 18 mm thick. Very safe 12 Volt operation with sunrise, daylight, sunset and moonlight cycles - 7 different cycles to choose from! * 40cm diameter * 43cm high * 30 litre capacity.