Buy Schungit stones. There are 3 different groups 1-3gr., 3-5gr., or 1-5gr together and 5-20gr.
Rinse the stones in the water. You don`t need Shungit dust.
Take 200gr. Schungit stones of the group 1-5gr. (1-3gr., 1-5gr.) by liter of the water. And if you have bought the group 5-20gr, take 400gr. by liter.
Wait at least 24 hours. But it would be better if you can wait 2 days (24 hours). You shouldn’t wait more than 3 days (72 hours), there is no point. So, you must wait 1-3 days.
At the end you need to pour the clean water in another container. Now you can drink the water! The water is ready to use!