The Carbon Filter Set 4 BioPlus for the BioPlus 50, 100, or 200 and BioPlus Thermo 50, 100, or 200 includes four replacement activated carbon filter foams
Safely regulates the pH value and water hardiness
Activated carbon absorbs unwanted substances in aquarium water
Customize your choice of filter foams to meet the needs of your aquarium
Carbon filter foams make replacement much simpler than common granular forms
Timing to replace the filter foam set varies upon aquarium size and the number of fish and plants