I make what is called "Blue Water". I use tap water that is allowed to sit in a clear blue glass container, in the window sill, to allow sunlight at it. I can not explain why this works, but all I know is my plants respond differently than if I just toss tap water in.I hope that helps. I would also look into silver and adding it to water, for it's anti-biotic effects.how does letting the water sit take away the flouride? and other negatively used chemicals in our water supply? i say our because globally our water supply is funked up.