# Filtration Bio-Balls Tetra BB Bio-Balls 2500 ml – biological media for external aquarium filters

**URL:** https://aio.lv/en/product--tetra-04838--12035858
**Data updated:** 2026-03-12 16:44 (EET)
**Category:** Aquarium Supplies
**Manufacturer:** Tetra
**Manufacturer code:** 04838
**EAN:** 4004218241169
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 26.99 €
**Prices and availability valid until:** 2026-07-27 23:59
**Price without VAT (21%):** 22.31 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--tetra-04838--12035858

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 15.07.2026 | free |
| Pickup points | 20.07.2026 | 1.89 EUR |
| Courier delivery to door | 20.07.2026 | 4.99 EUR |

## Summary description

Tetra BB Bio-Balls 2500 ml are biological filter media designed for use in external aquarium filters. The spherical polymer bio-balls provide large surface area for beneficial nitrifying bacteria, supporting biological filtration to reduce ammonia and nitrite. Suitable for freshwater and marine setups, they are used to improve water quality in canister and hang-on filters and in custom filter baskets.

## Long description

Tetra BB Bio-Balls 2500 ml are spherical polymer biological filter media engineered for external aquarium filters. The open-structure bio-balls provide a large specific surface area that supports colonization by nitrifying bacteria, contributing to stable biological filtration. Designed for both freshwater and marine aquaria, this media is suitable for canister filters, hang-on filters and custom filter baskets where improved nitrification and water clarity are required.
Advantages
The spherical design and perforated structure maximize surface area while maintaining good water flow and oxygen exchange around the colonies of beneficial bacteria. Made from durable, non-toxic polymer, these bio-balls resist compaction and degradation, ensuring long-term biological performance. Their neutral material and shape allow easy placement and removal in modular filter chambers without creating excessive channeling or obstruction.
Suitable for
Freshwater aquariums requiring enhanced biological filtration
Marine and reef systems for supplemental nitrifying media
External canister filters and hang-on-back filters
Custom filter baskets and DIY filtration setups
Key specifications
Volume: 2500 ml of spherical polymer bio-media
Shape: perforated spherical balls to increase effective surface area
Material: durable, aquarium-safe polymer resistant to degradation
Compatibility: suitable for freshwater and marine use
Hydraulic properties: designed for good water flow and oxygen exchange
How to use
Rinse the bio-balls briefly in dechlorinated water or aquarium water to remove any dust from packaging before first use. Place the media into an appropriate chamber of the external filter, filter basket or media bag, ensuring even distribution to allow unrestricted water flow. Combine with mechanical and chemical media as required by your filtration layout; position bio-balls downstream of coarse mechanical filtration to prevent clogging. Maintain existing beneficial bacterial colonies by avoiding complete sterilization of the media during routine maintenance.
Usage recommendations
Do not clean bio-balls with tap water containing chlorine; use aquarium water when rinsing to preserve nitrifying bacteria. Replace only a portion of biological media at any one time to maintain stable bacterial populations. Monitor ammonia and nitrite levels after installation or maintenance and allow time for bacterial colonization to stabilize the nitrogen cycle.

## FAQ

### How much does the Tetra BB Bio-Balls 2500 ml biological filter media cost, and is it available for purchase?

The price is 26.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 10 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 15.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All Tetra products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized Tetra service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

https://aio.lv/img/cache/product/12035858/67523183_large.webp