# Internal Aquarium Filter Tetra IN plus IN 300 — internal filter for tanks, model IN 300

**URL:** https://aio.lv/en/product--tetra-tetra-in-plus-internal-filter-i--1015759
**Data updated:** 2026-04-01 09:43 (EEST)
**Category:** Pet Food
**Manufacturer:** Tetra
**Manufacturer code:** Tetra IN plus Internal Filter I
**EAN:** 4004218174870
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 29.49 €
**Prices and availability valid until:** 2026-07-27 23:59
**Price without VAT (21%):** 24.37 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--tetra-tetra-in-plus-internal-filter-i--1015759

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 15.07.2026 | free |
| Pickup points | 20.07.2026 | 1.89 EUR |
| Courier delivery to door | 20.07.2026 | 4.99 EUR |

## Summary description

Tetra IN plus IN 300 is an internal aquarium filter designed for use inside freshwater tanks. It provides mechanical and biological filtration with replaceable media, mounting inside the aquarium for compact installation. Suitable for continuous filtration, water circulation and improving water quality in home aquariums. Use for maintaining clear water and supporting aquatic life.

## Long description

Tetra IN plus IN 300 is an internal aquarium filter designed for use inside freshwater home aquariums. The unit provides combined mechanical and biological filtration with replaceable media to help maintain clear water and stable water parameters. Its compact internal mounting reduces external equipment clutter while ensuring continuous water circulation and oxygenation for fish and plants.
Advantages
The filter integrates mechanical and biological filtration stages in a single compact housing, enabling removal of particulate matter and supporting beneficial bacterial colonization. Its replaceable media simplify maintenance and allow targeted cleaning or media exchange. Installation inside the tank offers a neat appearance and quieter operation compared with some external systems. The design supports continuous water circulation, which helps reduce dead zones and improves gas exchange at the water surface.
Suitable for
Small to medium freshwater aquariums requiring internal filtration
Home tanks where compact, unobtrusive equipment is preferred
Setups needing mechanical removal of debris and biological filtration to support stable water chemistry
Key specifications
Type: Internal aquarium filter with mechanical and biological filtration
Mounting: Inside aquarium, compact profile for minimal visual impact
Media: Replaceable filter media for mechanical and biological stages
Flow: Continuous water circulation suitable for maintaining oxygenation and reducing stagnant zones
Suitable water type: Freshwater aquariums
How to use
Install the filter inside the aquarium following the manufacturer’s mounting guidelines so the unit is submerged to the recommended level. Fit the supplied or compatible replaceable media into the filter cartridge and connect to power using a protected outlet. Allow the filter to run continuously to establish biological filtration; initial cloudy water is common as beneficial bacteria colonize the media. Maintain water level and avoid running the filter dry.
Usage recommendations
Perform regular maintenance by rinsing or replacing mechanical media when visibly clogged and replacing biological media according to the manufacturer’s schedule to avoid loss of beneficial bacteria. Monitor flow and water clarity, and combine the filter with routine partial water changes and debris removal for best results.

## FAQ

### How much does the Tetra IN plus IN 300 internal aquarium filter cost, and is it available for purchase?

The price is 29.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 30 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 15.07.2026 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/1015759/3305380_large.webp