Comparison : Item # L5328, L- Series 2.5 X 6" granular activated carbon
Item # L5340, L- Series 2.5 X 6" granular activated carbon
Item # L5386, L- Series 2.5 X 6" granular activated carbon with polyphosphate
Item # L5305, L- Series 2.5 X 6" sediment
Item # L5321, L- Series 2.5 X 6" 10 micron carbon block