USE FOR SWIMMING POOLS:
ASTRALPOOL Silica quartz Sand/Gravel (quartziferous) by Astralpool special for filtering pool water, perfect for the correct use of the cleaning pump.
Material in perfect quality specially made for the treatment and purification of swimming pool water "special sand filter" (it is advisable to read carefully the manual of your pump before use).
Filtration Sand Granulometry 0.4-0.8 mm