Active Clear Glass Activated Filter Media

Active Clear Glass is a filter media made of recycled glass granules with an activated surface. Its non-porous structure does not clump, does not form preferential flow channels in the filter bed and does not let bacteria attach, which means a cleaner filter bed and a lower need for chemicals.

In comparative tests at an independent laboratory (CTM Centre Tecnològic, project PR13/0118), the final water quality of the Active Clear Glass filter was better than that of a sand filter; under test conditions it reached 1.5 NTU after one hour of operation and turbidity fell by more than 90%. The wash water flow needed to fluidise the bed is lower than for standard glass, saving up to 50% water compared with sand filters.

The filter bed is built using the three grain sizes together. For filters smaller than Ø900 mm, 80% of the bed volume should be 0.5-1.0 mm (Grade 1) and 20% 3.0-7.0 mm (Grade 3); for filters larger than Ø900 mm, 60% Grade 1, 20% 1.0-3.0 mm (Grade 2) and 20% Grade 3 is recommended. The coarse grain covers the laterals in the bottom layer, while the fine grain performs the filtration on top.

The product complies with UNE EN 12902:2006 (chemicals used for treatment of water intended for human consumption – supporting and filtering materials). It can be used with automatic disinfection systems such as salt electrolysis as well as conventional chlorination, and suits media replacement in private and public pools that use sand filters.