Hi Anthony; I don't think as they are kits that drinking "too much water" would be anything to worry about. Also, do you have a humidifier in the room? When mine is out of water my guys drink about twice as much as when it's running with water in it. Just like humans, with dry air we all need more water intake. take care, Gary Violence is not strength, Compassion is not weakness. From Camelot. [Moderator's note: Well, nobody else mentioned it yet, so I will: Anthony, when you say "they go through all 16oz"... what makes you think they're they're actually DRINKING the stuff? Lots of these little guys seem to get more on the floor from tapping the ball than in their mouths! BIG] [Posted in FML issue 1500]