Man builds 30k litre reef aquarium in his house 
A man named Eli from Israel has built a 30,000-litre coral reef aquarium in his living room. The tank which is big enough for Eli to swim in, uses 1,00,000 litres of water every hour and has a filtration system underneath. A six-minute video explains the process of the working of the aquarium which was started in 2012. 