# Internal aquarium filter Tetra IN plus IN 800 — internal filter for freshwater tanks, compact submersible unit

**URL:** https://aio.lv/en/product--tetra-03286--10465921
**Data updated:** 2026-03-27 13:54 (EET)
**Category:** Aquarium Supplies
**Manufacturer:** Tetra
**Manufacturer code:** 03286
**EAN:** 4004218607668
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 50.49 €
**Prices and availability valid until:** 2026-07-18 23:59
**Price without VAT (21%):** 41.73 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--tetra-03286--10465921

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 09.07.2026 | free |
| Pickup points | 14.07.2026 | 1.99 EUR |
| Courier delivery to door | 14.07.2026 | 4.99 EUR |

## Summary description

Tetra IN plus IN 800 is an internal submersible aquarium filter designed for freshwater tanks. The compact unit provides mechanical and biological filtration using replaceable media, fits inside the tank and mounts submerged, and is suitable for improving water clarity and maintaining healthy conditions for fish and plants. Ideal for hobbyists needing unobtrusive internal filtration.

## Long description

Tetra IN plus IN 800 is a compact internal aquarium filter designed for freshwater tanks. The submersible unit delivers combined mechanical and biological filtration using replaceable media cartridges. Engineered to be placed inside the aquarium and mounted submerged, the IN 800 helps reduce visible debris and supports stable water parameters to maintain a healthy environment for fish and aquatic plants. The compact design keeps the device unobtrusive while providing continuous circulation and filtration appropriate for small to medium freshwater setups.
Advantages
The filter integrates mechanical pre-filtration and biological media in a single replaceable cartridge, simplifying maintenance and media replacement. Its compact submersible housing allows flexible placement inside the tank without external plumbing. Quiet operation and low energy consumption make it suitable for continuous use. The unit is compatible with standard aquarium setups and provides reliable water circulation to improve clarity and oxygen distribution.
Suitable for
Small to medium freshwater aquariums requiring internal filtration
Community fish tanks with plants where unobtrusive equipment is preferred
Hobbyists seeking a simple replaceable-media solution for mechanical and biological filtration
Key specifications
Filtration type: combined mechanical and biological filtration
Installation: fully submersible internal mount
Media: replaceable cartridge system with mechanical and biological layers
Compatibility: intended for freshwater aquaria
Operation: continuous circulation delivering improved water clarity and oxygenation
How to use
Install the unit fully submerged inside the aquarium according to the manufacturer’s mounting guidelines, ensuring the intake and outflow are unobstructed. Insert the replaceable filter cartridge into the housing before powering the device. Run the filter continuously to maintain water circulation; check and replace the cartridge at intervals recommended by the cartridge’s packaging or when flow decreases. Regular partial water changes and routine tank maintenance will complement the filter’s function.
Usage recommendations
Position the filter where it provides good circulation across the tank, avoid blocking the intake with décor, and replace cartridges promptly to preserve biological filtration. Match the unit size to the aquarium volume and monitor flow rate during initial operation to confirm correct placement.

## FAQ

### How much does the Internal aquarium filter Tetra IN plus IN 800 cost, and is it available for purchase?

The price is 50.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 5 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 09.07.2026 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 Tetra 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 Tetra 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/10465921/52511640_large.webp