# Aqua Natura aquarium bio ball filter by K&N FILTERS, for tank openings Ø136–178 mm

**URL:** https://aio.lv/en/product--kn-filters-tn-44586--12028692
**Data updated:** 2026-03-12 16:37 (EET)
**Category:** Aquarium Supplies
**Manufacturer:** K&N FILTERS
**Manufacturer code:** TN-44586
**EAN:** 5904479445865
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 12.99 €
**Prices and availability valid until:** 2026-07-23 23:59
**Price without VAT (21%):** 10.74 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--kn-filters-tn-44586--12028692

## 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

Aqua Natura bio ball aquarium filter from K&N FILTERS designed for biological filtration in home and public aquaria. The unit accepts spherical media and fits tank openings with diameters from 136 to 178 mm. It provides mechanical and biological support for beneficial bacteria colonization, helps maintain water clarity and stability, and is suitable for use in sumps or filter housings requiring this opening size.

## Long description

The Aqua Natura aquarium bio ball filter by K&N FILTERS is a biological filtration unit designed for home and public aquaria. It is built to accept spherical bio media and to be installed in tanks or filter housings with openings between 136 and 178 mm in diameter. The unit provides a stable surface area for nitrifying bacteria, combines mechanical and biological filtration functions, and helps maintain water clarity and chemical stability in both freshwater and marine setups where compatible media and flow conditions are used.
Advantages
The design supports high surface area for beneficial bacteria colonization while allowing water to flow freely through the spherical media. Constructed for compatibility with standard aquarium filter housings, the unit reduces suspended particles via mechanical trapping and promotes biological conversion of ammonia and nitrite. Its dimensions make it suitable for retrofitting into sumps or filter compartments with the specified opening range, simplifying upgrades and maintenance without major tank modification.
Suitable for
 Home and public aquaria requiring biological filtration
 Sumps and filter housings with tank openings Ø136–178 mm
 Freshwater and marine systems using spherical bio media
 Systems needing additional surface area for nitrifying bacteria
Key specifications
 Compatible tank opening diameter: 136–178 mm
 Filtration type: mechanical and biological (media-based)
 Media form accepted: spherical bio balls
 Intended application: aquarium sump or filter housing installation
 Suitable for: freshwater and marine aquaria (when compatible media used)
How to use
Install the Aqua Natura bio ball filter in a sump or filter compartment that has an opening between 136 and 178 mm in diameter. Place appropriate spherical bio media into the unit according to the media manufacturer's guidance, ensuring even distribution to allow unobstructed water flow. Connect the filter assembly to the aquarium circulation system so that water passes through the media at a moderate flow rate; avoid excessive turbulence that could displace media or reduce bacterial contact time. Regularly inspect the media and unit during routine maintenance and replace or clean media as recommended by the media supplier to preserve biological activity and mechanical filtration performance.
Usage recommendations
Use established bio media and allow time for nitrifying bacteria to colonize before relying on the unit for full biological filtration. Monitor water parameters (ammonia, nitrite, nitrate) after installation and after media changes. When used in marine systems, choose media compatible with saltwater chemistry and ensure stable flow and oxygenation for effective bacterial activity.

## FAQ

### How much does the Aqua Natura aquarium bio ball filter — K&N FILTERS cost, and is it available for purchase?

The price is 12.99 € (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 K&N FILTERS 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 K&N FILTERS 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/12028692/67516557_large.webp