Tetra Filter Rings

Hollow ceramic filter rings for mechanical and biological filtration

Large internal surface for optimal bacterial colonization — suitable for all external filters

✅ Level: Easy — Place in the filter basket. Rinse with aquarium water during maintenance.

The Tetra Filterrings are hollow ceramic filter rings with a large internal surface for both mechanical and biological filtration. The unique hollow structure ensures even water flow in different directions through the filter medium. The large internal surface provides an ideal colonization site for beneficial nitrifying bacteria. Suitable for all external filters including the Tetra EX series.

🔧 Product Specifications

🚚 Delivery & Warranty

• Delivered quickly from our store — ready for immediate use
• Shipping Tuesday or Friday → Learn more about shipping
• Delivery with track & trace, usually within 1–2 working days
• Problem with your order? We will solve it together. Contact us via our customer service.
• Free shipping on orders over €59,-

✂️ Usage Tips

Rinse the Filterrings monthly with aquarium water — never with tap water. Ceramic filter rings are very durable and rarely need to be replaced. Never replace all filter materials at once.

💡 Tip

Combine with Tetra FilterFloss (mechanical) and Tetra BioFoam (biological) for a complete filter configuration in your external filter.

❓ Frequently Asked Questions

How long do ceramic filter rings last?
Ceramic filter rings are very durable and last for years with proper maintenance. Only replace when visibly damaged or clogged.

Do Filterrings also fit in other external filters?
Yes — Filterrings are suitable for all external filters, not just the Tetra EX series.

Do you have another question? Feel free to contact us — we are happy to help you make the right choice for your aquarium.