Marina Slim Filter Carbon Plus Ceramic Cartridge 3 pack

The Marina Slim Filter Cartridge Bio-Carb is the water-polishing replacement cartridge for your Marina Slim S10, S15, or S20 hang-on-back power filter. Each cartridge combines a polyester floss pad that traps debris with activated carbon and Ceramitek ceramic media that remove odors and discoloration while growing beneficial bacteria. The result is cleaner, clearer water and a healthier tank, in both freshwater and saltwater setups.

Keeping your Marina Slim filter stocked? Browse all filter media and cartridges at Squeaky's Aquatics.

Why Bio-Carb

• Removes odors and discoloration. Activated carbon adsorbs the dissolved organics, tannins, and odors that cloud and yellow your water.
• Polishes water and clears medication. A great choice for crystal-clear water and for stripping leftover medication after a treatment.
• Three-stage media in one cartridge. Floss for mechanical filtration, carbon for chemical filtration, and Ceramitek ceramic for biological filtration.
• Freshwater and saltwater safe. Works in tropical, coldwater, and marine aquariums alike.

How to Use

• Fits the Marina Slim S10, S15, and S20 hang-on-back power filters. Simply slide the old cartridge out and the new one in.
• Rinse the cartridge under tank water before the first use to clear any loose dust.
• Replace roughly every 3 to 4 weeks, or sooner if flow slows. The carbon becomes exhausted with use, so this cartridge is replaced rather than rinsed and reused.
• Run it after dosing medication to clear the water, and any time you want a brighter, cleaner-looking tank.

Specifications

Recommended Pairings

• Fighting ammonia in a new or goldfish tank instead? Choose the Marina Slim Bio-Clear cartridge (zeolite plus Ceramitek) instead.
• Explore more filter media and cartridges for every hang-on-back filter we carry.

Frequently Asked Questions

What is the difference between Bio-Carb and Bio-Clear?
Bio-Carb uses activated carbon to remove odors and discoloration and works in fresh or salt water. Bio-Clear uses zeolite to remove ammonia and is freshwater only, ideal for goldfish and new tanks. Both include Ceramitek ceramic for biological filtration.

Should I run carbon all the time?
It is optional. Many keepers run carbon continuously for clear water, while others use it as needed to clear tannins or remove medication. Just remove carbon before dosing meds.

How often do I replace it?
Every 3 to 4 weeks, or sooner if flow slows. Once the carbon is saturated it stops working, so the cartridge is replaced rather than reused.

Which filters does it fit?
The Marina Slim S10, S15, and S20 hang-on-back power filters.