How should shungite be prepared correctly before first use? — Shungite Premium Water Filter, 150 g

The card does not describe the preparation of shungite (rinsing, soaking). The only instruction: use 2–3 l of water per 150 g of shungite. Pack weight — 150 g.

General information (not a manufacturer's instruction): natural stones are usually rinsed with running water before first use; shungite does not replace checking the quality of drinking water.