Enable the stone to dry on its own. Set it inside of a dry spot from moisture to circumvent micro organism growth. As a result of its porous construction, pumice is used in soil mixes for horticulture. It helps with water retention, aeration, and drainage in potting soils and back https://edenproductsltd.co.uk/2025/04/17/the-history-of-pumice-stone-from-ancient-civilisations-to-modern-day-uses/