Comparison : Item # Q5328, Q- Series 2.5 X 6" granular activated carbon
Item # Q5333, Q- Series 2.5 X 6" granular activated carbon
Item # Q5386, Q- Series 2.5 X 6" granular activated carbon with polyphosphate
Item # Q5367, Q-Series 2.5 X 6" granular activated carbon with KDF
Item # Q5305, Q- Series 2.5 X 6" sediment