Jon...

Here's a good thread on the importance of drinking water http://forum.lowcarber.org/showthre...threadid=91798. Eight 8 oz. glasses of water per day is the minimum and I've seen a lot of recommendations to drink half your body weight in ounces of water daily. I personally shoot for at least 2 liters, but I think that 2 gallons would be a bit excessive unless you exercise strenuously or live/work in hot dry conditions.

HTH