Replacement Zeo-Carb Carbon Cartridge for Fluval C3 Filter, 3 x 130 g

Zeo‑Carb replacement carbon cartridge for the Fluval C3 filter, supplied as a pack of three 130 g cartridges. Each cartridge combines mechanical filtration with activated carbon media to reduce organic waste, remove odours and help clear discoloration from aquarium water. Designed to fit the Fluval C3 media tray, these cartridges are intended for routine maintenance in freshwater and planted tanks to support improved water clarity and overall water quality.

Advantages

These replacement cartridges provide combined mechanical and chemical adsorption in a single unit, trapping particulate matter while the activated carbon adsorbs dissolved organic compounds that cause cloudiness and odours. The pre-shaped design ensures a secure fit in the Fluval C3 media tray, simplifying cartridge replacement and reducing the risk of bypass. Supplied as a three-pack, they offer multiple maintenance cycles without the need to handle loose media.

Suitable for

• Freshwater aquariums using Fluval C3 filtration
• Planted tanks where water clarity and removal of dissolved organics are important
• Routine filter maintenance and water polishing after water changes

Key specifications

• Quantity: 3 cartridges per pack
• Media type: Mechanical filtration layer combined with activated carbon
• Net media weight per cartridge: 130 g
• Compatibility: Designed for Fluval C3 media tray
• Intended use: Adsorption of dissolved organics, odour reduction, and mechanical particle removal

How to use

Install each cartridge into the Fluval C3 media tray according to the filter manufacturer’s instructions, ensuring the cartridge is seated correctly to prevent bypass and maintain optimal flow. Replace cartridges on a routine schedule or when water clarity and odour indicate reduced performance; typical replacement intervals depend on bioload and tank conditions. Dispose of used cartridges responsibly and wash hands after handling used media. Do not attempt to rinse activated carbon extensively before use unless directed by the filter instructions; minimal rinsing may be performed to remove dust.

Usage recommendations

For consistent results, replace cartridges at regular intervals based on tank size and stocking levels, and combine with regular mechanical media cleaning and water maintenance. Avoid using activated carbon continuously in systems where trace elements or medications need to be retained, as carbon will adsorb some dissolved substances.