# Aquarium filter media sera Siporax Nitrat-minus Professional 500 ml – biological nitrate reduction media

**URL:** https://aio.lv/en/product--sera-se-32631--12022389
**Data updated:** 2026-03-11 20:57 (EET)
**Category:** Aquarium Supplies
**Manufacturer:** sera
**Manufacturer code:** SE-32631
**EAN:** 4001942536448
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 14.49 €
**Prices and availability valid until:** 2026-07-23 23:59
**Price without VAT (21%):** 11.98 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--sera-se-32631--12022389

## 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

sera Siporax Nitrat-minus Professional 500 ml is a porous biological filter media designed for aquarium nitrate reduction. Packaged as 500 ml, it provides surface area for denitrifying bacteria, supports biological conversion of nitrate, and is intended for use in external and internal filters, sumps, and fluidized beds to improve water quality and reduce nitrate levels for freshwater and marine systems.

## Long description

sera Siporax Nitrat-minus Professional 500 ml is a porous biological filter media engineered to support nitrate reduction in freshwater and marine aquaria. The granulated ceramic material offers extensive internal and external surface area for colonization by denitrifying bacteria, enabling biological conversion of nitrate compounds. The product is supplied as a 500 ml portion suitable for use in external canister filters, internal filters, sumps, and fluidized-bed systems where enhanced biological filtration and nitrate control are required.
Advantages
The porous structure promotes establishment of an active bacterial community that converts nitrate under low-oxygen conditions, helping to reduce nitrate accumulation without chemical additives. The granules are chemically stable and resistant to breakdown, providing long-term surface area for biofilm formation. Because it is a physical media designed for biological action, it can be integrated with mechanical and chemical filtration stages to maintain overall water clarity and quality.
Suitable for
Freshwater aquaria with plants and fish where nitrate control is required
Marine and reef systems as a supplemental biological nitrate reducer
External canister filters, internal filters and filter sumps
Fluidized-bed reactors and denitrification chambers
Key specifications
Form: porous ceramic granules with high internal surface area
Volume: 500 ml packed portion
Intended function: supports denitrifying bacterial colonization for biological nitrate reduction
Compatibility: suitable for freshwater and marine filtration setups
Physical durability: resistant to mechanical breakdown under normal filter flow
How to use
Rinse the media briefly in dechlorinated water to remove dust from packing. Place the granules in a dedicated media chamber, fluidized-bed reactor, or a fine-mesh bag inside the filter where flow promotes contact with low-oxygen zones. Ensure the media receives continuous, moderate water flow; avoid direct exposure to strong mechanical agitation that could cause abrasion. Monitor nitrate levels regularly and combine with regular mechanical filtration and water changes as part of routine maintenance. Replace or top up the media volume only when performance declines noticeably, rather than on a fixed short-term schedule.
Usage recommendations
Use sera Siporax Nitrat-minus Professional as part of a multi-stage filtration approach: mechanical pre-filtration to remove solids, biological media for nitrification and denitrification, and optional chemical media when required. Regularly test nitrate concentrations and adjust media quantity and flow patterns to maintain target water quality for your specific aquarium inhabitants.

## FAQ

### How much does the sera Siporax Nitrat-minus Professional 500 ml cost, and is it available for purchase?

The price is 14.49 € (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 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/12022389/67510709_large.webp