# Filter sponge cartridge Hagen Fluval U4 – replacement sponge insert (MPN 010582)

**URL:** https://aio.lv/en/product--hagen-010582--12053138
**Data updated:** 2026-03-20 09:50 (EET)
**Category:** Aquarium Supplies
**Manufacturer:** Hagen
**Manufacturer code:** 010582
**EAN:** 015561104883
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 7.99 €
**Prices and availability valid until:** 2026-07-22 23:59
**Price without VAT (21%):** 6.60 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--hagen-010582--12053138

## 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 sponge cartridge designed for Hagen Fluval U4 filter systems. This foam insert serves as mechanical and biological filtration media to trap debris and provide surface area for beneficial bacteria. Intended for regular maintenance and cartridge replacement to maintain water clarity and healthy aquarium conditions for freshwater and community setups.

## Long description

Replacement sponge cartridge designed for Hagen Fluval U4 filter systems. This foam insert provides mechanical filtration by trapping debris and suspended particles and supports biological filtration by offering surface area for beneficial bacteria. It is intended for regular maintenance and periodic cartridge replacement to help maintain water clarity and stable aquarium conditions in freshwater and community aquariums.
Advantages
The Hagen Fluval U4 replacement sponge insert combines open-cell foam structure with a size tailored to fit the U4 cartridge chamber, ensuring even water flow and efficient particle capture. Its porous surface promotes colonization by nitrifying bacteria, helping to reduce ammonia and nitrite levels. The cartridge is simple to install and remove, compatible with the original filter housing, and washable for repeated use between replacements.
Suitable for
Freshwater aquariums using Hagen Fluval U4 filter systems
Community tanks where mechanical and biological filtration are required
Routine maintenance and cartridge replacement schedules
Key specifications
Material: open-cell foam for mechanical and biological filtration
Design: form-fit insert sized for Fluval U4 cartridge chamber
Function: traps debris and provides surface area for beneficial bacteria
Maintenance: washable and reusable between recommended replacements
Intended environment: freshwater aquarium filtration
How to use
Turn off the Fluval U4 filter and disconnect power before opening the unit. Remove the used cartridge from the cartridge chamber and extract the old sponge insert. Rinse the new sponge under aquarium-temperature water to remove any packaging residue, then place it into the cartridge housing ensuring a snug fit. Reinstall the cartridge, reassemble the filter according to the manufacturer’s instructions, and restore power. Follow a regular maintenance schedule: check the sponge for accumulated debris and rinse as needed to maintain flow and filtration performance.
Usage recommendations
Rinse the sponge with aquarium water during weekly or biweekly maintenance to preserve beneficial bacteria. Replace the sponge insert according to water quality, stocking levels, and the manufacturer’s guidance to ensure effective mechanical and biological filtration.

## FAQ

### How much does the Hagen Fluval U4 filter sponge cartridge cost, and is it available for purchase?

The price is 7.99 € (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 Hagen 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 Hagen 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/12053138/67539220_large.webp