Once you are treating more than a jug at a time, it helps to run a line of containers rather than one at a time — each treated a day apart, so there is always some finished and ready.

The mechanics are simple. Line up each filled container left to right — the longest-treated on the left, the most recently treated on the right. A ceramic gravity filter does the final polishing.

Whenever the level runs low, take the leftmost container in the line and pour it into the top of the gravity filter, leaving the bulk of the sediment behind in the container so it does not clog the filter. Then rinse, refill, and treat that emptied container, and set it at the end of the line on the right.

As the water passes into the filter’s lower chamber, it removes any fine particulates carried over, and you draw all your drinking and cooking water from the bottom spigot — clear, mineralized, and redox-balanced, at least closer to what water looked like before the Industrial Revolution. When the flow slows as the pores clog, the top chamber lifts off and rinses clean under warm water.

In practice it becomes a small morning ritual: start the coffee, and while it brews, move the line along — pour, rinse, refill, treat, and set at the end. Gravity filtration comes last and does none of the main purifying; it removes only the small amount of fine material that carries over.