# Aquarium and Terrarium Polished Stones sera Black Pebble III 20–30 mm 10 kg

**URL:** https://aio.lv/en/product--sera-tn-41125--11983206
**Data updated:** 2026-03-11 16:38 (EET)
**Category:** Aquarium Supplies
**Manufacturer:** sera
**Manufacturer code:** TN-41125
**EAN:** 5904479411259
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 12.99 €
**Prices and availability valid until:** 2026-07-23 23:59
**Price without VAT (21%):** 10.74 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--sera-tn-41125--11983206

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 14.07.2026 | free |
| Pickup points | 17.07.2026 | 1.89 EUR |
| Courier delivery to door | 17.07.2026 | 4.99 EUR |

## Summary description

Polished decorative stones from sera, Black Pebble III, sized 20–30 mm, packaged as 10 kg per unit. Designed for use in aquariums and terrariums as substrate or decorative gravel. The smooth, rounded pebbles provide a stable base for plants and ornamentation, are suitable for freshwater setups and reptile enclosures where inert, non-toxic decor is required.

## Long description

sera Black Pebble III polished stones are decorative, smooth pebbles sized 20–30 mm and supplied in a 10 kg pack. Intended for aquarium and terrarium use, these stones serve as an inert substrate or decorative gravel that creates a natural look while providing a stable base for plants and ornaments. The rounded surface reduces debris trapping and is compatible with freshwater systems and reptile enclosures where non-toxic, chemically neutral decor is required.
Advantages
The polished finish yields a visually consistent, low-porosity surface that is easy to clean and maintain. Uniform 20–30 mm sizing ensures good stability for decorative elements and live plants, while the 10 kg quantity covers a significant area depending on desired depth. Being inert and non-reactive, these pebbles do not alter water chemistry in freshwater aquaria and are suitable for terrarium environments where stable, safe substrate materials are necessary.
Suitable for
 Aquarium substrate for freshwater tanks
 Decorative layers in terrariums and paludariums
 Base for planting live or artificial aquatic plants
 Reptile enclosure floor covering where smooth, non-toxic stones are preferred
Key specifications
 Pebble size: 20–30 mm (rounded, polished)
 Finish: polished, low-porosity surface
 Pack weight: 10 kg
 Intended use: aquarium and terrarium substrate/decorative gravel
 Chemical behaviour: inert and non-reactive in freshwater environments
How to use
Rinse the pebbles thoroughly with clean water before first use to remove any dust or residual particles from packaging. Spread the stones evenly across the bottom of the aquarium or terrarium to the desired depth, taking care to create a stable, level surface for plants, driftwood, or ornaments. For aquaria, combine with filtration and routine water testing to monitor stability; these pebbles do not replace biological substrate layers if required by specific plant species. In terrariums, position stones to allow for drainage layers or humidity control as appropriate for the housed species.
Usage recommendations
For best results, use a layer thickness suitable for the intended function: a shallower layer for decorative coverage or a deeper bed where plant root anchorage or moisture retention is needed. Avoid sharp cleaning tools on the polished surface to maintain the finish, and perform periodic rinsing during maintenance to prevent buildup of organic material.

## FAQ

### How much does the sera Black Pebble III 20–30 mm polished stones 10 kg cost, and is it available for purchase?

The price is 12.99 € (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 14.07.2026 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/11983206/67438756_large.webp