It comes from the Reservoir.

When you come out of the water it means your soul is clean from all the sin that you have done. when you are done with a baptize you have a clean slate

Water based paint will do that

A fast and cheap was to further filter and clean water is to purchase a water filter. These filters can be connected to a tap and also come in the form of a pitcher.

Water is never going to run out,, water itself will never run out, clean water or fresh water might run out but that's only a MIGHT, we can always come up with a way to clean salty water