Aqua One AquaStyle 126/380, Focus 26/36, AquaBac 100, Lifestyle 21/29 & AquaNano Carbon Cartridge (2pk) 1c (25001C)

Keep your aquarium water cleaner, clearer and healthier with genuine Aqua One Carbon Cartridge 1C (25001C) replacement filter cartridges.

Designed specifically for a range of Aqua One internal filters, these genuine replacement cartridges contain activated carbon that helps remove dissolved impurities, unpleasant odours, discolouration and residual medications from your aquarium water. Replacing your carbon cartridge regularly helps maintain efficient filtration and supports a healthier environment for your fish.

If you’ve noticed cloudy water, reduced water clarity or it’s been more than 6–8 weeks since your last cartridge replacement, it’s probably time to install a fresh cartridge.

Compatible Aquariums

This genuine Aqua One 1C Carbon Cartridge is suitable for the following Aqua One aquariums and filters:

• AquaStyle 126
• AquaStyle 380
• Focus 26
• Focus 36
• AquaBac 100
• Lifestyle 21
• Lifestyle 29
• AquaNano aquariums that use the 1C cartridge

If you’re unsure whether this is the correct cartridge for your aquarium, feel free to contact our team before ordering—we’re always happy to help.

Why Replace Your Carbon Cartridge?

Activated carbon doesn’t last forever.

Over time it becomes exhausted and gradually loses its ability to remove impurities from your aquarium water.

Replacing your cartridge every 6–8 weeks helps:

✔ Remove unpleasant odours

✔ Reduce yellow water and discolouration

✔ Remove residual medications after treatment

✔ Improve water clarity

✔ Maintain effective filtration

✔ Keep your aquarium looking its best

Genuine Aqua One Quality

Using genuine Aqua One replacement cartridges ensures the correct fit and optimal performance for your aquarium filter.

Unlike some aftermarket alternatives, genuine cartridges are designed specifically for your Aqua One filter, helping maintain proper water flow and filtration efficiency.

Aquarium Spare Parts Expert Tip

? Rinse your new cartridge before installation.

Before placing the cartridge into your filter, give it a quick rinse under clean tap water for around 20–30 seconds. This helps remove any loose carbon dust and prevents temporary black particles from entering your aquarium after installation.

Replacement Schedule

For the best filtration performance we recommend:

• Carbon Cartridge: Replace every 6–8 weeks
• Filter Wool: Replace every 2–4 weeks (where fitted)
• Biological Media: Rinse in aquarium water only and replace only when required

Regular maintenance helps keep your filter operating efficiently while providing the healthiest possible environment for your fish.

Frequently Asked Questions

Can I rinse and reuse the carbon cartridge?

No. While you can gently rinse debris from the outside, activated carbon becomes exhausted over time and should be replaced rather than reused.

Does this cartridge remove ammonia?

No. The activated carbon is designed to remove dissolved organic compounds, odours and medication residues. Biological filter media is responsible for processing ammonia and nitrite.

Can I use this after treating my fish with medication?

Yes. In fact, this is one of the most common reasons to replace your carbon cartridge. Installing fresh activated carbon after completing a medication treatment helps remove any remaining medication from the water.

How do I know when it’s time to replace the cartridge?

As a general guide, replace the cartridge every 6–8 weeks, or sooner if water flow is reduced or the carbon has been heavily used after medication or water quality issues.

Why Buy From Aquarium Spare Parts?

When you purchase from Aquarium Spare Parts, you’re buying from an Australian specialist that has helped aquarium owners with over 180,000 orders. We stock genuine replacement parts, provide expert compatibility advice, and dispatch orders quickly from our Australian warehouse so you can keep your aquarium running at its best.