Marina Slim Filter Zeolite Plus Ceramic Cartridge 3 pack

The Marina Slim Filter Cartridge Bio-Clear is the ammonia-fighting 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 zeolite and Ceramitek ceramic media that lock up toxic ammonia and grow beneficial bacteria. The result is cleaner, clearer, lower-stress water, which makes this the ideal choice for start-up tanks and heavily stocked freshwater aquariums.

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

Why Bio-Clear

• Adsorbs toxic ammonia. The zeolite grabs free ammonia through ion exchange, lowering the single most dangerous parameter for your fish.
• Reduces fish stress. Ideal for new setups, overstocked tanks, and goldfish tanks, which produce a lot of waste and benefit from extra ammonia control.
• Three-stage media in one cartridge. Floss for mechanical filtration, zeolite for chemical ammonia removal, and Ceramitek ceramic for biological filtration.
• Freshwater formula. Zeolite works by ion exchange, which only functions in freshwater, so Bio-Clear is made for freshwater aquariums.

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 zeolite becomes saturated with use, so this cartridge is replaced rather than rinsed and reused.
• Great to keep on hand while cycling a new tank or any time an ammonia test creeps above zero.

Specifications

Recommended Pairings

• Prefer odor and discoloration control over ammonia? Choose the Marina Slim Bio-Carb cartridge (carbon 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-Clear and Bio-Carb?
Bio-Clear uses zeolite to remove ammonia and is freshwater only, ideal for goldfish and new tanks. Bio-Carb uses activated carbon to remove odors and discoloration and works in fresh or salt water. Both include Ceramitek ceramic for biological filtration.

Can I use Bio-Clear in a saltwater tank?
No. The zeolite removes ammonia by ion exchange, which does not work in saltwater. Use Bio-Carb for marine setups.

How often do I replace it?
Every 3 to 4 weeks, or sooner if flow slows. Once the zeolite 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.