Matrikx CR1 this carbon cartridge is a true market leader, 0.5 micron rating for >99.99% chlorine and >99.99% for Cryptosporidium & Giardia cysts, turn this one up as fast as you like as the treatment ratings are up to 10 litres per minute for 40,000 litres with good sediment tolerance as well. This cartridge exceeds the tough NSF rating by nearly double and is Independently tested and certified.
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