Filtered tap water, using Living Water II system by EcoQuest.com
but I am not happy with the result.
Water gets quickly stale sometimes in less then half a day, especially in the summer
when municipal water is horrible.
As of now I'm plannning to buy distiler and use my ecoQuest as prefiltration.
After distilation I will use Vitalizer Plus to create Hexagonal water.
that's the plan.