The treatment of water without the use of filter gravel
and filter sand (quartz sand) on
an industrial scale is impossible.
High portion of SiO2 (contained in quartz sand)
EN 12904 – Products for the treatment of Water for
human use – quartz sand and quartz gravel
DIN EN 15798 / DIN 19643 – Products for the treatment of
swimming pool water – Filter materials
DIN 4924 – Sand and gravel for well construction –
Requirements and tests
Local supplier of high quality silica sand.