# Airstone Sphere 4 cm ZOLUX – aquarium air diffuser stone

**URL:** https://aio.lv/en/product--zolux-66774--12031079
**Data updated:** 2026-03-12 16:39 (EET)
**Category:** Aquarium Supplies
**Manufacturer:** ZOLUX
**Manufacturer code:** 66774
**EAN:** 3336023213125
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 4.99 €
**Prices and availability valid until:** 2026-07-18 23:59
**Price without VAT (21%):** 4.12 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--zolux-66774--12031079

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 10.07.2026 | free |
| Pickup points | 15.07.2026 | 1.99 EUR |
| Courier delivery to door | 15.07.2026 | 4.99 EUR |

## Summary description

ZOLUX airstone in a 4 cm spherical shape is an aquarium air diffuser stone designed to produce fine bubbles and improve water aeration. Made for use with air pumps and tubing, this 4 cm sphere enhances oxygen distribution and water circulation in freshwater and marine tanks. Suitable for small to medium aquariums, plant and fish care.

## Long description

The ZOLUX Airstone Sphere 4 cm is a spherical aquarium air diffuser stone designed to generate fine, consistent bubbles to improve oxygenation and water movement in freshwater and marine tanks. Compatible with standard air pumps and flexible tubing, this 4 cm airstone promotes even gas exchange and helps maintain a stable environment for fish, invertebrates and aquatic plants. Its compact spherical shape allows easy placement on substrate or within decorative hardscape without dominating tank layout.
Advantages
The spherical airstone produces a uniform stream of fine bubbles that increases surface agitation and oxygen transfer without creating strong currents. Made from porous material, it resists clogging under normal aquarium conditions and provides prolonged, steady aeration when used with an appropriate air pump. Its small 4 cm size makes it suitable for discreet installation in small to medium tanks and planted aquaria where gentle water movement is preferred.
Suitable for
 Small to medium freshwater aquariums
 Planted tanks that require gentle circulation
 Marine and reef setups for localized aeration
 Quarantine or breeding tanks where oxygenation is critical
Key specifications
 Shape: spherical (ball)
 Diameter: 4 cm
 Material: porous diffusion stone (ceramic/airstone composite)
 Intended connection: compatible with standard airline tubing via rigid or flexible tubing and airline fittings
 Application: air diffusion for oxygenation and water circulation in aquaria
How to use
Attach the aquarium airstone to an air pump using suitable airline tubing and any required check valve or flow control. Position the 4 cm sphere on the substrate or secure it under a decorative element; ensure tubing is routed to avoid sharp kinks. Start with a moderate air flow and adjust pump output or use an inline air valve to achieve the desired bubble density and water movement. Regular observation of bubble production and tank conditions will indicate when maintenance or replacement is needed.
Usage recommendations
Periodic cleaning can extend the functional life of the airstone: remove it from the aquarium and gently scrub with a soft brush under running water to clear surface deposits. Do not use soaps or chemical cleaners. Replace the airstone if bubbles become large and irregular or flow decreases significantly, as this indicates internal clogging. Match pump output to the airstone size to avoid overworking the pump and to maintain efficient, fine-bubble diffusion.

## FAQ

### How much does the ZOLUX airstone sphere 4 cm 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 10.07.2026 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 ZOLUX 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 ZOLUX 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/12031079/67518634_large.webp