Includes: Six Tank Power cartridges: Two Tank power 1, One Tank Power 2, One Tank Power 3, One Tank Power Post Carbon (PC), One Tank Power Calcite (CAL) Unique patent design and color FDA Approved, Food Grade Material Tank Power 1: Developed with Blue Ring Technology using three layers of filtration, removes 10 times smaller particles than regular cartridges. A 99.9% filtration of all impurities. Power 1 longevity: up to 3 months Tank Power 2: Developed with MicroPores Technology which the absorption of 99.9% of Chlorine Color, Taste and Odour. New conical shape, with a wider base that acts as an indicator for a correct cartridge installation. Power 2 Longevity: Absorption Performance lasts up to 6 Months Tank Power 3: Developed with MicroPores Technology which works with Power 2 the absorption of 99.9% of the Smallest Impurities, Organic Materials, Chlorine, Color, Taste and Gases. Power 3 Longevity: Absorption Performance lasts up to 6 Months Tank Power Post Carbon (PC): The absorption of 99.9% of Chlorine Color, Taste and Odour. Power PC Longevity: Up to 12 Months Tank Power Calcite with extra 10% Calcite: responsible for healthy Calcium addition to purified water Neutralizes the acidity Levels in purified water. Increases the alkaline PH Level in purified water. Power Calcite Longevity: Up to 12 Months.