aerowana, green tea isnt strong enough to lose that much water. I cut my water intake to just over 2 litres on thursday, and took a diazide(diuretic before bed). That was fun as you get up ever hour to piss. Another diuretic friday morning, as well as friday night, and just over a litre of water all day.
Thats how I dropped 15lbs of water, its pretty miserable