# Aquarium Filter Media Tetra CR Filterrings 2500 ml – Biological and Mechanical Filter Rings

**URL:** https://aio.lv/en/product--tetra-04194--10456280
**Data updated:** 2026-03-11 11:52 (EET)
**Category:** Aquarium Supplies
**Manufacturer:** Tetra
**Manufacturer code:** 04194
**EAN:** 4004218241183
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 23.99 €
**Prices and availability valid until:** 2026-07-15 23:59
**Price without VAT (21%):** 19.83 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--tetra-04194--10456280

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 06.07.2026 | free |
| Pickup points | 09.07.2026 | 1.99 EUR |
| Courier delivery to door | 09.07.2026 | 4.99 EUR |

## Summary description

Tetra CR Filterrings 2500 ml are loose ring-shaped filter media designed for aquarium filtration. Packaged as 2.5 L of ceramic-style rings, they provide mechanical debris capture and expanded surface area for biological filtration by beneficial bacteria. Suitable for canister and internal filters, they help stabilize water quality, reduce ammonia and nitrite levels, and support healthy aquarium ecosystems.

## Long description

Tetra CR Filterrings 2500 ml are loose ring-shaped ceramic-style filter media intended for aquarium filtration. Supplied as a 2.5 litre package, these rings combine mechanical and biological filtration properties: their open ring form traps suspended debris while their porous surface provides extensive area for colonisation by beneficial nitrifying bacteria. Compatible with canister and internal filters, Tetra CR Filterrings help stabilise water parameters by supporting the natural breakdown of ammonia and nitrite and contribute to clearer water and a balanced aquarium environment.
Advantages
The porous ceramic surface of these filter rings increases available surface area for bacterial colonisation, enhancing biological filtration without altering water chemistry. Their ring shape and loose form enable efficient water flow and mechanical trapping of particulate matter. Tetra CR Filterrings are non-reactive, durable for long-term use, and easy to arrange inside typical filter baskets or chambers. They are suitable for both freshwater and most community saltwater systems where ceramic media is appropriate.
Suitable for
External canister filters needing combined mechanical and biological media
Internal box or hang-on-back filters with media baskets
Freshwater community aquariums and planted tanks
Systems requiring reduction of ammonia and nitrite through bacterial colonisation
Key specifications
Form: loose ring-shaped ceramic-style media
Volume: 2.5 litres of media
Primary functions: mechanical debris capture and biological filtration
Material characteristics: porous, inert ceramic-style composition
Compatibility: designed for use in canister, internal and other filter types with media baskets
How to use
Rinse the filter rings briefly in dechlorinated or aquarium water to remove dust before installation. Place the rings in the designated media chamber or basket so that water can flow freely through and between them; avoid overly compacting the media to maintain optimal flow and surface exposure. For new setups, allow at least several weeks for full bacterial colonisation before relying on biological filtration alone; in established systems the rings will gradually become seeded with beneficial bacteria and contribute to nitrogen cycle stability.
Usage recommendations
Maintain routine filter maintenance by inspecting and gently rinsing the rings in aquarium water during regular filter cleaning to remove accumulated solids while preserving beneficial bacteria. Replace only a portion of the media at a time when necessary to avoid disrupting biological filtration. Monitor water parameters (ammonia, nitrite, nitrate) after installation or after significant maintenance to ensure stable conditions.

## FAQ

### How much does the Tetra CR Filterrings 2500 ml filter media cost, and is it available for purchase?

The price is 23.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 5 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 06.07.2026 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

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