In Peace Corps we used a filter bucket and added bleach. Took very little bleach, though I don't recall how often we had to change the filter. It was essentiall

In Peace Corps we used a filter bucket and added bleach. Took very little bleach, though I don't recall how often we had to change the filter. It was essentially this: https://www.outbackwater.com/outback-5-gallon-gravity-powered-nano-purification-system-ob-25nf/ https://www.outbackwater.com/outback-5-gallon-gravity-powere...