yeh nert, don't worry bout wat everyone says about drinking too much...if you drink too much at once. well yes its bad for you...but you can filter 15 litres a day - you're capable of it. i managed that once over the course of day at work, my average was about 10 litres a day. after 2 weeks i couldn't tell if i was wearing makeup or not, my skin was so clear!!! for a 19 year old, not too bad. then someone said 'gah thats bad, 2 litres a day is enough...'
but i didn't see any bad side effects at all.
summer and winter does make a huge difference though...where i am its summer in a month, so i can go back to drinking water all day long, and hopefully not thinking about eating so damn much...