The most experienced brewers in the world today use Siliceous/ diatomaceous earth filter systems since no other filter system can produce the amazing results of a SE/DE filter. Known for being a “low metals” filter aid, 20 Microns siliceous earth based products for filter aids remove fine particles without affecting the colour or flavour as it is natural, adaptable, and flexible. The lower permeability grades form filter cakes, having small pores which produce a high degree of clarification. The higher permeability grades have larger pores and provide increased throughput with slightly reduced clarity.
20 Microns also has natural siliceous earth grades which are low crystalline-silica, low permeability products, used primarily as filter aids in filtration. These natural products are off-white in color and have a reasonable permeability range.