To maximize the lifespan of a cartridge, always choose the clearest water. GeoPress cartridges deliver ~350 cycles (250 liters / 65 gallons) while UltraPress offer ~300 cycles (150 liters / 40 gallons). Water quality matters; avoid silt and sediment. Preemptively filter out silt and sediment with a handkerchief or t-shirt to extend the life of a cartridge.