Fluval Zeo-Carb Media Insert for AC20/30 Aquarium Filters (FV-6505)

Fluval Zeo-Carb Media Insert for AC20/30 is a cartridge designed to combine zeolite and activated carbon for chemical filtration in compatible aquarium filter units. It is formulated to reduce dissolved ammonia and adsorb organic contaminants, odors and discoloration in both freshwater and marine tanks. The insert is intended for periodic replacement as part of routine maintenance to help maintain water clarity and support stable water chemistry when used alongside mechanical and biological filtration.

Advantages

The Fluval Zeo-Carb media insert provides two-stage chemical filtration by pairing zeolite’s ammonia-reduction properties with activated carbon’s adsorption of organics and discoloration. Its form factor matches AC20 and AC30 filter cartridges, allowing straightforward insertion and removal without modification. The media helps preserve water clarity and reduce unwanted odors while operating silently inside the filter housing, and it is suitable for continuous use as part of a planned cartridge exchange schedule.

Suitable for

• Freshwater community and planted aquariums where ammonia control is necessary
• Marine and saltwater aquariums requiring organic contaminant removal and clarity improvement
• Reef or fish-only systems that use canister-style filter cartridges with AC20/AC30 compatibility
• Routine maintenance cycles to restore chemical filtration capacity after organic load increases

Key specifications

• Combined media composition: zeolite and activated carbon for dual-function chemical filtration
• Designed shape and size for use in compatible AC20 and AC30 filter cartridge slots
• Intended application: reduces dissolved ammonia and adsorbs organic compounds, odors and discoloration
• Suitable for use in freshwater and marine aquarium environments
• Single-use disposable cartridge intended for periodic replacement to maintain performance

How to use

Turn off and unplug the filter before opening the housing. Remove the existing cartridge according to the filter manufacturer’s instructions and insert the Fluval Zeo-Carb media insert into the designated cartridge slot so it seats securely. Close the filter housing, restore power, and allow the filter to resume normal operation. Monitor water parameters regularly—particularly ammonia—and replace the cartridge as part of routine maintenance or sooner if water clarity or odor control declines.

Usage recommendations

Use the Zeo-Carb insert in combination with mechanical and biological filtration stages for balanced water treatment. Replace on a regular schedule compatible with aquarium bioload and manufacturer guidance, and avoid relying solely on chemical media for long-term ammonia control—address source issues and maintain biological filtration to ensure stable aquarium chemistry.