# Internal Aquarium Filter Tetra IN plus IN 400 for 30–60 L Aquariums

**URL:** https://aio.lv/en/product--tetra-03284--10556796
**Data updated:** 2026-04-01 09:45 (EEST)
**Category:** Aquarium Supplies
**Manufacturer:** Tetra
**Manufacturer code:** 03284
**EAN:** 4004218607644
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 34.49 €
**Prices and availability valid until:** 2026-07-29 23:59
**Price without VAT (21%):** 28.50 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--tetra-03284--10556796

## 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 400 is an internal aquarium filter designed for tanks with a capacity of 30–60 liters. The compact internal unit provides mechanical and biological filtration, includes replaceable media chambers and adjustable flow, and suits freshwater and planted aquariums. Ideal for improving water clarity, supporting beneficial bacteria, and maintaining stable aquarium conditions.

## Long description

Tetra IN plus IN 400 is an internal aquarium filter designed for home aquariums with a capacity of 30–60 litres. The compact unit integrates mechanical and biological filtration in a single housing, with replaceable media chambers and an adjustable flow control. It is suitable for freshwater and planted tanks and intended to support water clarity and stable water parameters by promoting beneficial bacterial colonisation.
Advantages
The internal construction combines a sponge-based mechanical filter with biological media to reduce suspended particles and provide surface area for nitrifying bacteria. A flow regulator allows you to adapt water movement to the needs of fish and plants. The design is compact and mounts inside the aquarium to save external space while keeping the aquarium visually uncluttered. Replaceable media chambers simplify maintenance and make it straightforward to refresh filtration material without disturbing the whole unit.
Suitable for
Freshwater aquariums sized 30–60 L
Planted tanks that require gentle, adjustable flow
Community tanks with small to medium-sized fish
Key specifications
Type: Internal aquarium filter with combined mechanical and biological filtration
Recommended aquarium volume: 30–60 litres
Flow control: Adjustable output to regulate water circulation
Filter media: Replaceable chambers for sponge and biological media
Installation: Submersible internal mounting suitable for horizontal or vertical placement depending on model configuration
How to use
Install the Tetra IN plus IN 400 inside the aquarium according to the manufacturer’s attachment method, ensuring the unit is fully submerged before powering on. Place the intake and outlet so that flow reaches all areas of the tank without creating excessive current through plant leaves. Adjust the flow control to match the bioload and plant requirements; reduce flow for delicate species or heavily planted setups. Perform routine maintenance by rinsing the sponge in aquarium water during water changes and replacing or refreshing biological media as advised to maintain effective filtration.
Usage recommendations
For stable water quality, combine regular mechanical cleaning of the sponge with periodic checking of the biological media. Avoid cleaning all filter media at once to preserve beneficial bacteria. Monitor water parameters after installation and after any major maintenance to ensure the filter rate and placement provide appropriate circulation without stressing inhabitants.

## FAQ

### How much does the Tetra IN plus IN 400 internal aquarium filter cost, and is it available for purchase?

The price is 34.49 € (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/10556796/52720503_large.webp