AquaClear 20 Activated Carbon Filter Insert improves water clarity in fresh and saltwater aquariums. Exclusively designed for the AquaClear 20 Power Filter, it provides superior adsorption qualities which eliminate odors, discoloration and impurities. 3-pack.

Other size available:

AquaClear 20 Activated Carbon Filter 135 g (4.8 oz)

AquaClear 30 Activated Carbon Filter 165 g (5.8 oz) 

AquaClear 50 Activated Carbon Filter 210 g (7.4 oz)

AquaClear 70 Activated Carbon Filter 420 g (14.8 oz)