- Durafilter Glass Filter Media – Item includes an extra shipping charge because of the weight
The replacement of the normal sand filter media with this glass based filter media has significant benefits not only in filtration but also in anti bacterial action and the health and safety of operatives: Key Advantages: return in capital in under 12 months , from water, energy and chemical savings improve water quality and minimise public health risk from contracting infectious diseases, filter media bacterial levels reduced by 1000 times improve air quality and reduce the risk to pool staff from occupation asthma and risk to children from predisposing them to asthma and respiratory disorders. 100% sustainable product inline with government regulations Drinking water standards compliant (is your filter sand??) Details of AFM: AFM will remove at least 30% more solids from the water that a high quality silica sand. AFM removes much smaller particles than sand through surface adsorption due to the high zeta potential on AFM. In controlled testing the Silica Sand removed 90% of all particles down to 10 microns whereas the A.F.M Grade 1 under the same conditions removed particles down to 5 microns. AFM removes dissolved organics and heavy metals, also by surface adsorption due to the high zeta potential Surface catalytic properties makes AFM self sterilising. AFM does not become blocked by bacterial growth in the filter bed. Surface catalytic reactions cracks organics and decolourises the water. Easy to back-flush, approx. 50% less water is used in comparison to sand Simple back flushing with water recharges the AFM AFM does not get consumed, it is likely that it will last for the life of the filter. Lower THM production than sand Very high attrition strength, resistant to strong acids and alkalis, does not leach free silica. Sand and zeolites (air born dust) are classified as a grade 2 carcinogens because of the free silica, zeolites are particularly dangerous. AFM® does not contain any free silica and as such it is much safer to use than sand. AFM has a fused amorphous and extremely stable structure as exemplified by the very high attrition strength and negligible loss under ignition. Static leaching tests have shown zero (below ppb detection level) leaching of metal ions over extended periods of time. It is believed that AFM will be stable between a pH of 4 and 10 for at least 30 years. When replacing sand use 30% of Grade 2 at the bottom and 70% of Grade 1 on top.A.F.M. Specifications. AFM has a similar appearance to sand. Standard particle size. Grade 1. - 0.5mm to 1mm Grade 2. - 1mm to 2mm Chemical composition. SiO² - 74% (Silicon Dioxide, Silica). Na²O - 11% (Sodium Oxide, Soda). CaO - 10% (Calcium Oxide, Burnt Lime) MgO - 3% (Magnesium Oxide, Magnesia) Al²O³ - 1% (Aluminium Oxide, Alumina, Aloxite)
