PWTAG Technical notes are updates or new material for the standards and guidance given in the PWTG book, Swimming Pool Water and the PWTAG Code of practice and should be read in association with these publications.
Glass has been used as a filtration medium since the early 1900s. But refined glass filter media have been available only in the last 20 years. Media currently available and widely used for pool filtration are either recycled, crushed glass or virgin glass beads.
Glass seems to function perfectly well as a filter medium. This technical note is about its practical application.
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