because with a filter i get 300-500 gallons for about $35 thats like .11 per gallon. distilled is about .85 a gallon, plus the cost of my gas because it isnt right next door and i drive a big pick up. and no i wouldnt be getting 300 gallons at a pop but even that would ultimately be cheaper. as dry as it is here in the winter i go thru a fair amount of water anyway i'd be at the store all the time. i am trying to make sure thats what it is. im switching to bottled for now until i can get a decent filter. i also have three pots of soil im checking the run off. one with plain tap but ph'd water, one with filtered(crap brita but it lowered the ph by one point) ph'd water and one with distilled ph'd water. if im right the one with tap water should see the ph increase over time. we'll see tho.