£10 Cash back voucher now available on the Classic 105 at Swell UK. The BiOrb Classic is what customer normally think of when looking for a BiOrb fish tank. The classic spherical design comes in a variety of colours and have the LED light system or the MCR (Multi Colour Remote). The classic "fishbowl" tank features the performance of a 'hi-tech' modern aquarium, allowing you to perfect your water chemistry and filtration systems more easily to support your fish life inside.