Your Cart
Your cart is empty.
Browse the store →Your cart is empty.
Browse the store →Title, summary, and primary media.
Description, long copy, and specifications.
Filtration media Mineral / pH
Calcite is calcium carbonate (CaCO3), the mineral that makes up limestone and marble, used as a filter medium to raise pH and add calcium.
Made of: Calcium carbonate (CaCO3)
Form: Loose mineral media; grain size not yet confirmed by the supplier
Main job: Raises pH and adds calcium to acidic or low-mineral water
Used in: Waslix custom layered cartridges
Calcite dissolves slowly in water that is acidic or low in minerals, releasing calcium and bicarbonate that raise the pH. It is self-limiting: as the water approaches balance it dissolves very little more, so under normal conditions it does not overshoot.
Raises pH: in a peer-reviewed lab study using deionised water, calcite raised the pH from about 6.5 to about 8.4
Adds calcium hardness and alkalinity: how much depends on contact time and how acidic the water is
Little effect on hard water: water already rich in calcium dissolves very little calcite
Not a contaminant filter: it adjusts water chemistry and is not used to remove chemicals, metals or microbes
Evidence: well established Calcite is a standard neutralising and remineralising medium, and the chemistry is well documented by filter-media makers and published studies. Those results come from lab tests and full-size neutraliser beds, not a thin cartridge layer, and they are not tests of this product.
Calcite belongs near the outlet, after any layer that removes minerals or works best at lower pH.
Layer position: Near the outlet, after DI resin, other ion-exchange resins, activated alumina and iron-based arsenic media
Pairs well with: Deionizer Resin (Blue Green) or other mineral-removing layers, where it adds back calcium and raises the pH
Keep in mind: It adds hardness, which can increase scale in kettles and coffee machines, and short contact in a cartridge means a modest change
Material | Calcium carbonate (CaCO3) |
|---|---|
Spec source | Product title |
Before first use: Rinse until the water runs clear, to wash out fine mineral dust
Storage: Keep sealed and dry, away from acids; avoid breathing the dust when pouring
Replacement: Calcite dissolves as it works, so the layer slowly shrinks; replace it with the cartridge
It raises the pH of acidic or low-mineral water toward balance; in a lab study using deionised water, calcite took the pH from about 6.5 to about 8.4. As the water nears balance it dissolves very little more, so it does not keep pushing the pH higher, and a thin cartridge layer with brief contact may change it less.
No. Calcite adds calcium hardness, so on hard water it can add to scale in kettles and coffee machines. It is meant for water that is acidic or low in minerals.
Deionized water has almost no minerals, can taste flat and can corrode metal parts. A calcite layer after the resin adds back some calcium and raises the pH, the same approach used to finish desalinated water.
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.
Calcite is calcium carbonate, the mineral in limestone and marble. It dissolves slowly into acidic or low-mineral water, adding calcium and alkalinity and raising the pH as the water approaches balance. It is not a contaminant filter and it adds hardness, so it suits the outlet end of a cartridge, after DI resin or other mineral-removing layers.
Waslix gathers, organizes, and researches a massive range of products across water, light, air, and energy. We demystify complex technologies to simplify your high-involvement purchasing decisions, making complete solutions easily accessible.
Edit this HTML block.