# Filter media Tetra NitrateMinus Pearls 250 ml – nitrate reduction for outdoor aquaria and ponds

**URL:** https://aio.lv/en/product--tetra-57018--12257425
**Data updated:** 2026-04-09 12:36 (EEST)
**Category:** Aquarium Supplies
**Manufacturer:** Tetra
**Manufacturer code:** 57018
**EAN:** 4004218189188
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 22.49 €
**Prices and availability valid until:** 2026-07-28 23:59
**Price without VAT (21%):** 18.59 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--tetra-57018--12257425

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 15.07.2026 | free |
| Pickup points | 20.07.2026 | 1.89 EUR |
| Courier delivery to door | 20.07.2026 | 4.99 EUR |

## Summary description

Tetra NitrateMinus Pearls is a 250 ml filter media designed to reduce nitrate levels in outdoor aquaria and garden ponds. The product contains pearlescent beads formulated to lower nitrates biologically/chemically, helping maintain water quality and reduce algae growth. Supplied as a single 250 ml pack for installation in external or pond filtration systems.

## Long description

Tetra NitrateMinus Pearls 250 ml is a granular filter media for outdoor aquaria and garden ponds, designed to reduce nitrate concentration over an extended period. The product is intended to be worked into substrate or filter beds where it supports biological nitrate reduction, lowers a key nutrient for algae and contributes to improved overall water quality with less maintenance effort.
Advantages
The pearlescent granules provide biological nitrate reduction for up to 12 months and are continually degraded by bacteria as they work in the substrate. Regular use leads to a long-term decrease in nitrate levels, which helps to restrict algae growth and stabilise water parameters. Application is simple because the granules are introduced into the gravel or filter media and remain out of sight.
Suitable for
Outdoor aquaria
Garden ponds
Freshwater and marine pond filtration systems
Setups where long-term nitrate control is required
When it may not be suitable
The product is not a rapid emergency treatment for dangerously high nitrate spikes; it is formulated for gradual, long-term reduction. Results depend on specific aquarium or pond conditions, so additional water management or mechanical filtration may still be necessary in heavily stocked or polluted systems.
Key specifications
Form: granulated pearlescent beads
Volume: 250 ml
Function: biological nitrate reduction
Effective duration: up to 12 months under normal conditions
Typical target nitrate range after treatment: below 40–50 mg/l (dependent on conditions)
Application: worked into gravel or filter media
How to use
Introduce the granules into the gravel layer or place them in the filter bed according to filter manufacturer guidance. The product is designed for continuous action and should be left in place; a new dose is recommended every 12 months. If a stronger effect is required, the dosage may be increased up to twice the standard amount. Follow routine pond or aquarium maintenance and water tests to monitor nitrate reduction and overall water quality.
What to consider before purchase
Intended use: outdoor aquaria and garden ponds
Not a fast-acting emergency nitrate remover
Effectiveness depends on stocking levels and pollutant load
Requires placement in substrate or filter media
Usage recommendations
Use one 250 ml pack per appropriate volume of filter or substrate as advised for your filtration system; check nitrate levels regularly and repeat dosing annually or increase dose if faster reduction is needed.

## Specifications

| Feature | Value |
|---|---|
| Volume | 250 ml |
| Suitable for | Outdoor |
| Quantity per pack | 1 pc(s) |

## FAQ

### How much does the Tetra NitrateMinus Pearls 250 ml filter media cost, and is it available for purchase?

The price is 22.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 30 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 15.07.2026 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/12257425/68170148_large.webp