EVERZIT® Carbonate

Calcium-carbonate filter media in accordance with EN 1018

EVERZIT® Carbonate is a natural filter media manufactured from pure calcium carbonate (CaCO3). It is used for deacidification of groundwater or for remineralization following reverse osmosis processes.

EVERZIT® Carbonate has high reactivity. When used in drinking water treatment, it increases the pH level and therefore facilitates iron and manganese removal.

Grain sizes

1.0 - 2.0  mm
2.0 - 3.0 mm
4.0 - 6.0 mm
6.0 - 8.0 mm

Other grain-size ranges can be supplied in accordance with your specific requiremants.
Please feel free to contact us!

Quality and purity

EVERZIT® As complies fully with the following standards and regulations:

  • EN 1018
  • German Drinking Water Ordinance 2023
  • DIN 19643
  • DVGW work sheet W 213
  • ÖNORM 6216

Chemical and physical characteristics

CaCO3approx. 99.1 %
MgCO3approx. 0.4 %
SiO2  approx. 0.25 %
Al2O3approx. 0.15 %
Fe2O3approx. 0.04 %
Bulk density 1400 - 1500 kg/m³

Features and benefits

  • No localized excess alkalinity after process stoppages
  • No danger of filter clogging by agglomeration
  • Highest material purity (CaCO3 > 99 %)
  • No grain decomposition, no swelling
  • Problem-free filtration, even in discontinuous operation



EVERZIT® Carbonate is used in single-layer filters and in some cases as the bottom layer in dual media filters to realize:
  • Neutralization of dissolved carbon dioxide (deacidification)
  • Hardening/remineralization following reverse osmosis (desalination)
  • Treatment of raw waters with low acid capacity (i.e. low carbonate hardness)
  • pH increase in swimming pool water after chlorination
  • Iron and manganese removal

Application sectors

  • Drinking water treatment
  • Sea water desalination
  • Water treatment in swimming pools
  • Process water treatment

Packaging and delivery

  • 25 kg or 50 kg PE bags on Euro pallets
  • 1000 kg big bags
  • Bulk transport in silo trucks