Description Aqua one cartridges are specifically designed for the removal of harmful toxins such as ammonia from your aquarium. For optimum results these should be replaced every 6 to 8 weeks for a well maintained and healthy aquarium. Carbon Cartridge to suit: Aqua One AquaStyle 126 Aqua One AquaStyle 380 Aqua One AquaStart 500 Aqua One LifeStyle 21 Aqua One LifeStyle 29 Aqua One Focus 25 Aqua One Focus 36 Aqua One AquaNano 30 Aqua One AquaNano 40 Aqua One Arc 16 Aqua One Arc 30 Aqua One Arc 46 Aqua One AquaBac 100
