It is amazing how much these filters keep out of the water. We have a Reverse Osmosis system here and love the water we get. The filters can be expensive though. I went through a lot of water yesterday while I was installing my new patio for the hot tub. Was a crazy hot day.
Ya, how much your drink, two to three gallons? In the summer here, I go through about 3 gallons a day if we are outside, and my weight fluctuates like 10 pounds in a day.
Oh, I easily went through about 6 litres so almost two gallons. I think I was sweating it out as fast as I was drinking it. Our son just started working in house framing and he is the same. Goes through so much water every day.