# Aquarium and Terrarium Polished Black Pebble Stones Sera 10–20 mm, 10 kg bag

**URL:** https://aio.lv/en/product--sera-tn-41124--11983388
**Data updated:** 2026-03-11 16:39 (EET)
**Category:** Aquarium Supplies
**Manufacturer:** sera
**Manufacturer code:** TN-41124
**EAN:** 5904479411242
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 19.49 €
**Prices and availability valid until:** 2026-07-14 23:59
**Price without VAT (21%):** 16.11 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--sera-tn-41124--11983388

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 06.07.2026 | free |
| Pickup points | 09.07.2026 | 1.99 EUR |
| Courier delivery to door | 09.07.2026 | 4.99 EUR |

## Summary description

Polished black pebble stones by Sera, sized 10–20 mm and supplied in a 10 kg pack for use as substrate or decorative gravel in aquariums and terrariums. These polished pebbles provide a stable base for plants and ornaments, are suitable for freshwater setups and reptile enclosures, and simplify cleaning and maintenance while enhancing visual appearance.

## Long description

Polished black pebble stones by sera, sized 10–20 mm and packed in a 10 kg bag, are designed for use as substrate or decorative gravel in aquariums and terrariums. The smooth, polished surface creates a consistent dark background that highlights plants, fish and ornaments while providing a stable base for rooted plants and larger decorative elements. These pebbles are intended for freshwater aquaria and reptile enclosures where a coarse decorative gravel is preferred over fine sand.
Advantages
The polished finish reduces sharp edges, simplifying cleaning and reducing the risk of injury to bottom-dwelling animals. The uniform size fraction (10–20 mm) ensures good stability for planted elements and decorative pieces and limits migration of fine substrate particles. The dark black color enhances contrast and visual depth in both aquariums and terrariums, and the non-porous surface minimises debris accumulation and makes rinsing straightforward.
Suitable for
Freshwater aquariums as decorative gravel or top layer over technical substrates
Terrariums and vivaria for reptiles, amphibians, and invertebrates
Planted tanks where large gravel is used to anchor heavier plants or ornaments
Decorative displays and paludaria where a dark, uniform base is desired
Key specifications
Material: polished natural pebble
Grain size: 10–20 mm
Finish: polished, smooth surface
Pack weight: 10 kg
Color: black
Intended environment: freshwater aquariums and terrariums
How to use
Rinse the pebbles thoroughly with freshwater until the rinse water runs clear to remove dust and fines from transport. Spread an even layer according to your setup: a decorative top layer of 1–3 cm or a thicker base layer where stability for plants and ornaments is required. When used over a technical substrate for planted tanks, leave sufficient depth of technical substrate beneath and avoid mixing excessively to prevent pore-clogging. Position heavier ornaments directly on the pebbles to ensure stability.
Usage recommendations
Before adding animals, cycle the aquarium as usual and monitor water parameters. For terrariums, ensure the pebble layer is compatible with your chosen humidity and drainage strategy; combine with a drainage layer if necessary. Regularly remove organic debris by siphoning or spot-cleaning the surface to maintain water quality and the appearance of the polished pebbles.

## FAQ

### How much does the Sera Polished Black Pebble 10–20 mm, 10 kg cost, and is it available for purchase?

The price is 19.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 11 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 06.07.2026 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 sera 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 sera 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/11983388/67438914_large.webp