Tetra BioBalls

Biological filter balls for mechanical and biological filtration — washable and reusable

Optimised for Tetra EX external filters — also suitable for other external filters

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

Tetra BioBalls are biological filter balls with a structured surface for both mechanical and biological filtration. They mechanically remove larger particles while providing a large surface area for beneficial nitrifying bacteria. Durable plastic construction — washable and reusable for long-lasting use.

🔧 Product specifications

🚚 Delivery & warranty

• Delivered quickly from our store — ready to use immediately
• Shipping Tuesday or Friday → Read more about shipping
• Delivery with track & trace, usually within 1–2 business days
• Problem with your order? We will solve it together. Please contact our customer service.
• Free shipping for orders over €59,-

✂️ Usage tips

Rinse the BioBalls monthly with aquarium water — never with tap water. BioBalls are reusable and rarely need to be replaced. Never replace all filter materials at once to keep the biological filter cycle intact.

💡 Tip

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

❓ Frequently Asked Questions

How long do BioBalls last?
BioBalls are reusable and last for years with proper maintenance. Rinse monthly with aquarium water and only replace if visibly damaged.

Do BioBalls also fit other external filters?
Yes — BioBalls are suitable for all external filters. They are optimised for the Tetra EX series but also fit other brands.

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