# Hagen AQUA CLEAR filter media cartridge 300/70 gravel insert for mechanical and biological filtration

**URL:** https://aio.lv/en/product--hagen-03861--12035403
**Data updated:** 2026-03-12 16:44 (EET)
**Category:** Aquarium Supplies
**Manufacturer:** Hagen
**Manufacturer code:** 03861
**EAN:** 015561106160
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 8.49 €
**Prices and availability valid until:** 2026-07-23 23:59
**Price without VAT (21%):** 7.02 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--hagen-03861--12035403

## 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

Hagen AQUA CLEAR WKŁAD 300/70 is a replacement filter cartridge designed for Aqua Clear canister/ hang-on filters. The insert contains gravel (żwir) media intended for mechanical trapping of debris and supporting biological filtration by providing surface area for beneficial bacteria. Use as a media layer in multi-stage filtration to improve water clarity and promote stable aquarium nitrogen cycling.

## Long description

Hagen AQUA CLEAR filter media cartridge 300/70 gravel insert for mechanical and biological filtration is a replacement media layer designed for Aqua Clear canister and hang-on filters. The insert contains gravel media that mechanically traps suspended debris while providing additional surface area for beneficial nitrifying bacteria. It is intended for use as a component in multi-stage filtration assemblies to enhance water clarity and support biological nitrogen cycling in freshwater or lightly planted aquariums.
Advantages
The gravel insert combines mechanical particle retention with porous surface area suitable for colonisation by bacteria, allowing simultaneous removal of particulates and support for biological processes. As a replaceable cartridge layer, it can be integrated into existing filter cartridges or media baskets, simplifying maintenance. The physical structure of the gravel promotes steady water flow through the media, helping maintain oxygen exchange and consistent filtration performance over time.
Suitable for (tasks / use cases)
 Mechanical removal of suspended particles and detritus in aquarium filtration
 Providing additional surface area for beneficial bacteria to support biological filtration
 Integration into multi-stage filtration setups in canister or hang-on Aqua Clear filters
 Use in freshwater and community aquariums where moderate mechanical and biological filtration is required
Key specifications
 Media type: gravel insert designed for mechanical and biological filtration
 Compatibility: designed for Aqua Clear 300/70 style filter cartridges and media compartments
 Function: traps particulate debris and offers surface area for bacterial colonisation
 Form factor: replaceable cartridge-layer insert suitable for multi-stage filter assemblies
How to use
Install the gravel insert as a layer inside the Aqua Clear filter cartridge or media basket according to the filter manufacturer’s assembly guidelines. Ensure water flow passes uniformly through the gravel layer to maximise mechanical trapping and contact with biological surfaces. Replace the insert at regular intervals or when excessive clogging reduces flow; rinse gently if short-term cleaning is needed, taking care not to remove established beneficial bacteria completely.
Usage recommendations
Inspect the insert periodically for accumulated debris and reduce replacement frequency by combining with finer mechanical media upstream. When performing maintenance, avoid aggressive scrubbing or use of chlorinated water to preserve bacterial colonies that support nitrification.

## FAQ

### How much does the Hagen AQUA CLEAR filter cartridge 300/70 cost, and is it available for purchase?

The price is 8.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 3 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/12035403/67522731_large.webp