Carbon Filter Foam Set of 4 for the Oase BioPlus 50, 100, or 200 and Oase BioPlus Thermo 50, 100, or 200 includes a course replacement filter foam
- Safely regulates the pH value and water hardiness
- Activated carbon absorbs unwanted substances in aquarium water
- Customize your choice of filter foams and fleeces to meet the needs of your aquarium
- Timing to replace the filter fleece set varies upon aquarium size and the number of fish and plants
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