# Air stone Tetra AS 35 by Tetra — aquarium aeration stone AS 35

**URL:** https://aio.lv/en/product--tetra-07209--12242861
**Data updated:** 2026-04-01 09:50 (EEST)
**Category:** Aquarium Supplies
**Manufacturer:** Tetra
**Manufacturer code:** 07209
**EAN:** 4004218603554
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 4.99 €
**Prices and availability valid until:** 2026-07-15 23:59
**Price without VAT (21%):** 4.12 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--tetra-07209--12242861

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 03.07.2026 | free |
| Pickup points | 08.07.2026 | 1.99 EUR |
| Courier delivery to door | 08.07.2026 | 4.99 EUR |

## Summary description

Tetra AS 35 is an aquarium air stone designed to produce fine bubbles for effective water oxygenation and circulation. Compatible with standard airline tubing and air pumps, this AS 35 stone improves gas exchange and supports healthy fish and beneficial bacteria. Suitable for freshwater and saltwater setups, it is used for aeration, circulation and enhancing filtration performance.

## Long description

Tetra AS 35 is an aquarium air stone engineered to create a steady stream of fine bubbles that enhance oxygen transfer and water circulation. Designed for compatibility with standard airline tubing and common aquarium air pumps, the AS 35 supports biological filtration and promotes a stable environment for both freshwater and saltwater aquaria. The compact design allows placement near filters, inside sump chambers, or directly in the display to boost gas exchange and reduce dead zones.
Advantages
The AS 35 produces uniformly sized fine bubbles that increase the contact area between water and air, improving dissolved oxygen levels without excessive surface disturbance. Its durable construction resists clogging under normal aquarium conditions and maintains consistent airflow when used with appropriately sized pumps and tubing. The stone’s size and shape make it easy to position for targeted circulation and it integrates with existing aeration setups.
Suitable for
Aeration in small to medium freshwater aquaria
Supplementary oxygenation in marine tanks and reef systems
Improving circulation near filters, heaters, or plant beds
Promoting gas exchange in sumps and refugia
Key specifications
Function: generates fine bubbles for aeration and circulation
Compatibility: standard airline tubing and aquarium air pumps
Application: suitable for freshwater and saltwater setups
Installation: inline placement or fixed position inside tank or sump
Material characteristics: porous diffuser element designed for even airflow
How to use
Connect the AS 35 to an aquarium air pump using suitable airline tubing and ensure the pump capacity matches the tank volume and desired bubble output. Place the stone where increased oxygenation or circulation is needed — for example near the filter outlet, heater, or plant area. If the stone is used in a sump, position it to create gentle flow through the filtration stages. Adjust pump flow or add an air control valve to regulate bubble size and volume. Periodically inspect the diffuser for signs of clogging and clean or replace it if airflow becomes restricted.
Usage recommendations
For reliable performance, use the AS 35 with an air pump appropriate for your aquarium size and consider adding an inline check valve to prevent backflow. Regular maintenance such as gentle brushing or soaking in dechlorinated water can prolong service life; avoid aggressive cleaners that could damage the porous surface. Monitor dissolved oxygen and fish behaviour to confirm the aeration level is suitable for your specific setup.

## FAQ

### How much does the Air stone Tetra AS 35 cost, and is it available for purchase?

The price is 4.99 € (valid at the time of publication and already includes all taxes). The item is available for order — 70 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 03.07.2026 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/12242861/68141724_large.webp