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Description, long copy, and specifications.
Filtration media Mineral / pH
Volcanic Stone Mineral Ball is a porous ball made from natural volcanic rock, used as a coarse, open layer in a filter bed.
Made of: Natural volcanic rock (supplier); the main constituents of volcanic rock are silicon, iron and aluminium oxides
Form: Balls
Main job: Forms a porous, open layer and releases small amounts of minerals
Used in: Waslix custom layered cartridges; also sold loose by weight
Volcanic rock is light, rough and full of pores. In a filter it forms an open layer that spreads the water, and its surface slowly gives off small amounts of the rock's minerals.
Porous layer: volcanic scoria has been tested as filter packing, mainly for wastewater
Releases minerals: the supplier states it gives off silicon, calcium, magnesium, sodium and other major and trace elements, without amounts
Not for contaminant removal: a lab study found volcanic rock takes up very little fluoride at pH 6 (under 15 mg per kg of rock), and we found no data behind the supplier's claims for chlorine, chromium or arsenic
Evidence: limited Volcanic rock has been studied as a filter packing material, mainly for wastewater, but we found no independent data on how much mineral it adds to drinking water. It is also marketed for 'negative-ion' and 'active' water; independent evidence for these effects is limited.
It is best used as a coarse layer near the inlet, where it spreads the flow before the finer filter media.
Layer position: Near the inlet, before the finer filter layers
Pairs well with: KDF-55 and activated carbon placed after it
Keep in mind: Porous stone can grow a biofilm when water sits, so keep it at the inlet end, not the outlet; it removes no contaminants
Material | Natural volcanic rock |
|---|---|
Form | Balls |
Spec source | Product title and supplier description |
Before first use: Rinse thoroughly until the water runs clear; porous rock sheds fine dust
Storage: Keep sealed and dry; it is silicate rock, so keep dust down when pouring
Replacement: The supplier gives no service life; replace it with the cartridge
We do not claim it does. We found no data behind the supplier's chlorine and heavy-metal claims, and a lab study found volcanic rock takes up very little fluoride at pH 6. Use carbon, KDF or other contaminant-removal layers for that job.
It is coarse and open, so it helps spread the water across the cartridge. Near the outlet, its pores could hold bacteria in water that sits overnight.
No certification is claimed for this product. Filter media can be certified for material safety (for example to NSF/ANSI 61) and complete systems for performance (NSF/ANSI 42 or 53), but we have not found such a listing for this material.
How well any medium works depends on your water, the flow rate, contact time and the other layers in the cartridge. This page describes the loose medium, not a certified filter system.
Volcanic Stone Mineral Ball is made from natural volcanic rock. It forms a porous, open layer near the cartridge inlet that helps spread the water flow, and the supplier states it releases small amounts of the rock's minerals. It is marketed for 'negative-ion' and 'active' water, for which independent evidence is limited, and it does not remove contaminants.
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