# Replacement Bio-Foam Sponge Insert for Fluval FX5/FX6 External Filters (FV-2391)

**URL:** https://aio.lv/en/product--fluval-fv-2391--12035853
**Data updated:** 2026-03-20 09:50 (EET)
**Category:** Aquarium Supplies
**Manufacturer:** Fluval
**Manufacturer code:** FV-2391
**EAN:** 015561102391
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 13.49 €
**Prices and availability valid until:** 2026-07-22 23:59
**Price without VAT (21%):** 11.15 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--fluval-fv-2391--12035853

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 14.07.2026 | free |
| Pickup points | 17.07.2026 | 1.89 EUR |
| Courier delivery to door | 17.07.2026 | 4.99 EUR |

## Summary description

Replacement Bio-Foam sponge insert designed for Fluval FX5 and FX6 external canister filters. Provides mechanical and biological filtration by trapping debris while offering porous surface for beneficial bacteria colonization. Fits the FX5/FX6 media baskets and is used for routine filter maintenance and media refresh to maintain water clarity and biological stability in freshwater and saltwater aquaria.

## Long description

Replacement Bio-Foam Sponge Insert for Fluval FX5/FX6 External Filters (FV-2391) is a shaped foam media pack made to fit the media baskets of Fluval FX5 and FX6 canister filters. The foam provides mechanical filtration by capturing suspended particles and biological filtration by offering a porous surface for beneficial nitrifying bacteria to colonize. This insert is intended for routine maintenance and media refresh to help maintain water clarity and biological stability in both freshwater and saltwater aquaria.
Advantages
The foam insert combines debris-trapping mechanical filtration with high-surface-area porosity for bacterial colonization, supporting effective ammonia and nitrite processing. Its shape and dimensions match Fluval FX5/FX6 media baskets for straightforward replacement and secure fit. The open-cell structure resists clogging when rinsed properly, and the material is compatible with repeated cleaning cycles during regular maintenance.
Suitable for
 Home freshwater aquariums using Fluval FX5 or FX6 external filters
 Marine and reef tanks where mechanical and biological filtration is required
 Routine filter maintenance and media replacement to restore flow and filtration efficiency
 Hobbyists needing spare or replacement media inserts for canister filter upkeep
Key specifications
 Function: mechanical and biological filtration
 Material: open-cell foam designed for aquarium use
 Compatibility: shaped to fit the media baskets of Fluval FX5 and FX6 canister filters
 Maintenance: washable and reusable when rinsed in aquarium water
 Intended use: freshwater and saltwater aquaria
How to use
Shut off and disconnect the filter according to the manufacturer’s safety instructions. Open the canister and remove existing media baskets. Replace the old foam insert with this replacement Bio-Foam, ensuring it seats properly in the designated media basket. Reassemble the canister, reconnect hoses, and restart the filter. Rinse the new foam gently in aquarium water if required to remove any loose particles before installation. Follow a staggered replacement approach if preserving established biological filtration is a priority.
Usage recommendations
For best results, inspect the foam during regular maintenance intervals and clean by rinsing in dechlorinated aquarium water to avoid killing beneficial bacteria. Replace foam inserts as part of a planned media refresh cycle rather than all at once to maintain biological stability. Monitor flow rate and water parameters after installation to confirm proper performance.

## FAQ

### How much does the Fluval FX5/FX6 Bio-Foam Replacement Sponge FV-2391 cost, and is it available for purchase?

The price is 13.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 11 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 14.07.2026 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 Fluval 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 Fluval 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/12035853/67523178_large.webp