MyfatBOSS Aquarium Filter Cartridges, 16-Pack Rite-Size C with Activated Carbon

MyfatBOSS Rite-Size C aquarium filter cartridges are a 16-piece replacement set for filtering aquarium water, compatible with Marineland Penguin PRO 275/375, Original Penguin 200/350, and EZ-Change #3 20-40 and 30-60 power filters.

• Cartridge size: 5.3 x 5.7 x 6 inches (13.5 x 14.5 x 15.2 cm) — compare these dimensions with your filter’s cartridge space.
• Triple-layer filter design with thickened filter spray cotton — provides filter media for aquarium water.
• Activated carbon — targets odors and discoloration in compatible aquarium systems.
• Designed to help cloudy aquarium water become clearer — supports a clearer-looking tank.
• Shake, rinse, and insert — makes routine cartridge changes straightforward.

These replacement cartridges are made for aquarium owners who want a compatible filter insert for routine water filtration and maintenance. The listed fit covers selected Marineland Penguin and EZ-Change power filter models, so matching the model name helps you choose the right cartridge for your setup. The filter media combines thickened filter spray cotton with activated carbon, bringing filtration and odor and discoloration control together in one cartridge.

Which filters do the MyfatBOSS Rite-Size C cartridges fit?

They fit Marineland Penguin PRO 275/375 and Original Penguin 200/350 filters, as well as EZ-Change #3 20-40 and 30-60 power filters. This model-specific compatibility makes them a replacement option for aquariums using one of those filter systems. Compare your filter model with these names before selecting the cartridges.

• Compatible filter families: Penguin PRO and Original Penguin.
• Also fits the specified EZ-Change #3 power filters.

How do the filter media and activated carbon help?

The cartridges use a triple-layer filter design with thickened filter spray cotton and aquarium-grade activated carbon. The carbon targets tank odors and discoloration, while the combined media is designed to help move cloudy water toward a clear appearance within days. This gives the cartridge a role in both routine filtration and improving the look of aquarium water.

• Activated carbon is included in the cartridge.
• The filtration design is intended to support clearer-looking aquarium water.

How do I install and replace a cartridge?

Shake, rinse, and insert the cartridge when changing your filter media. For best results, replace it every 2–4 weeks. This simple sequence suits regular aquarium filter maintenance and provides a clear replacement interval to use as part of your routine.

• Replacement method: shake, rinse, then insert.
• Recommended replacement interval: every 2–4 weeks.

MyfatBOSS Rite-Size C cartridges suit aquarium owners with one of the compatible filters who want replacement media featuring thickened filter spray cotton and activated carbon. Their listed model fit, clear replacement routine, and cartridge dimensions help buyers match them to a specific aquarium filter. They are made for the compatible filter models named above.

Read our guide: A beginner’s aquarium set-up checklist: from bowl to tank