# External Aquarium Filter AquaNatura TN-45197, Flow 350 l/h, For Aquariums up to 40 L, With Bio Filter Roll and Skimmer

**URL:** https://aio.lv/en/product--aquanatura-tn-45197--12398982
**Data updated:** 2026-04-27 22:32 (EEST)
**Category:** Aquarium Supplies
**Manufacturer:** AquaNatura
**Manufacturer code:** TN-45197
**EAN:** 5904479451972
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 17.49 €
**Prices and availability valid until:** 2026-08-10 23:59
**Price without VAT (21%):** 14.45 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--aquanatura-tn-45197--12398982

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 30.07.2026 | free |
| Pickup points | 04.08.2026 | 1.89 EUR |
| Courier delivery to door | 04.08.2026 | 4.99 EUR |

## Summary description

AquaNatura external aquarium filter TN-45197 delivers 350 l/h flow suitable for aquariums up to 40 liters. It includes a bio filter roll for biological filtration and an integrated skimmer to remove surface debris. Designed for mechanical and biological water treatment, it supports clearer water, reduced maintenance and healthier conditions for small freshwater or tropical tanks.

## Long description

The AquaNatura external aquarium filter TN-45197 provides a flow rate of 350 l/h and is designed for aquariums up to 40 litres. Engineered for combined mechanical and biological filtration, the unit includes a bio filter roll that traps fine particles and supports beneficial bacteria, together with an integrated skimmer that removes surface film and floating debris. The compact housing and connections make it suitable for small freshwater and tropical tanks where space-efficient, continuous filtration is required.
Advantages
The external filter offers steady circulation at 350 l/h, reducing standing zones and improving oxygenation. The included bio filter roll provides a large surface area for colonisation by nitrifying bacteria, which assists in biological ammonia and nitrite removal. An integrated skimmer helps keep the water surface clear of oils and organic films, improving gas exchange. The design aims to lower routine maintenance by combining mechanical pre-filtration and biological media in a single unit.
Suitable for
 Small freshwater aquariums and planted community tanks up to 40 L
 Beginner and hobbyist setups requiring reliable mechanical and biological filtration
 Nano aquariums where an external compact filter is preferred to internal units
When it may not be suitable
This filter is not intended for aquariums larger than 40 litres or for heavy bioloads such as large cichlid or breeding tanks; in those cases a unit with higher flow and larger media capacity is recommended. It may also be unsuitable for marine or reef systems that require specialized protein skimmers and saltwater-compatible media.
Key specifications
 Flow rate: 350 litres per hour
 Recommended aquarium volume: up to 40 litres
 Filtration types: mechanical and biological
 Included media: bio filter roll
 Integrated feature: surface skimmer
 Approximate external dimensions: compact housing suitable for small cabinets or back panels
How to use
Install the AquaNatura external filter according to the manufacturer’s instructions, positioning the intake and return hoses securely on the aquarium rim and priming the unit if required. Fit the bio filter roll in its designated compartment to ensure water passes through the mechanical media before reaching the biological area. Start the pump and check for steady flow and proper skimmer operation at the surface; adjust hose positions to optimise circulation without strong currents that could disturb plants or small fish. Perform regular inspection and replace or rinse the bio roll and clean the skimmer chamber according to usage and tank load.
What to consider before purchase
 Confirm aquarium volume does not exceed 40 L to ensure adequate filtration performance
 Assess the bioload (fish quantity and feeding level) to determine if a higher-capacity filter is needed
 Check available space for external mounting and routing of hoses
 Determine ease of access for routine maintenance and media replacement
Usage recommendations
For best results, pair the AquaNatura filter with regular partial water changes and routine maintenance of the bio filter roll. Monitor water parameters after installation and during the first weeks to allow biological filtration to establish; replace the bio roll on a schedule based on visible fouling and water quality rather than fixed intervals.

## FAQ

### How much does the AquaNatura External Aquarium Filter TN-45197 cost, and is it available for purchase?

The price is 17.49 € (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 30.07.2026 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 AquaNatura 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 AquaNatura 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