Filtraion Media Sand Silica sand used for water filtration units has a round shape which make it perfect media to capture suspended solids in water. FEATURES– 20 kg packing– particle size:(0.7-1.1) mm fine sand (0.7 – 2.5) mm sand(2-3) mm gravel Activated carbonGranulated activated carbon, coal based. it used for dichlorination units FEATURES-Packing 50 L