Natural Water Filter?
I saw a water filter system in someone’s house a few years ago that was homemade and cannot remember how they said they made it. I remember there was some shiny stones – looked like they were polished but not fancy – on the bottom of a plastic water container. She said, if memory serves, that they were using a filter for an aquarium containing carbon and chunky rocks bought at the store. They said they filled it with the tap water. The siggot was on the bottom and the used it for their coffee, ice cubes and drinking water. She said they simply changed the filter once per month and cleaned the rocks. My questions are these: has anyone ever heard of such a homemade system? If so, what type of filter is she talking about? Is the 1 x per month accurate? Is is safe to use as I have small children in my home? Thank you in advance for your assistance.