# sera Nitryt negative reagent 250 ml – water test reagent for nitrite measurement

**URL:** https://aio.lv/en/product--sera-se-32301--12268465
**Data updated:** 2026-04-16 14:14 (EEST)
**Category:** Aquarium Supplies
**Manufacturer:** sera
**Manufacturer code:** SE-32301
**EAN:** 4001942522106
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 15.49 €
**Prices and availability valid until:** 2026-07-12 23:59
**Price without VAT (21%):** 12.80 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--sera-se-32301--12268465

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 03.07.2026 | free |
| Pickup points | 08.07.2026 | 1.99 EUR |
| Courier delivery to door | 08.07.2026 | 4.99 EUR |

## Summary description

sera Nitryt negative reagent 250 ml is a liquid test reagent designed for nitrite (NO2-) analysis in aquarium and pond water. Supplied as a 250 ml bottle, it is used with sera testing kits or similar nitrite test procedures to detect and quantify nitrite levels, helping monitor water quality and protect fish and aquatic life.

## Long description

sera Nitryt negative reagent 250 ml is a liquid reagent formulated for nitrite (NO2-) analysis in aquarium and pond water. Supplied in a 250 ml bottle, this reagent is intended for use with sera nitrite test kits or compatible nitrite test procedures to produce colour changes that indicate nitrite concentration. Regular testing with a dedicated nitrite reagent helps maintain a stable aquatic environment by making nitrite levels visible and measurable.
Advantages
The reagent is provided in a ready-to-use liquid form in a 250 ml container suitable for multiple tests. It is compatible with standard nitrite testing methods and designed to react consistently under the conditions specified by the test kit. Using a dedicated nitrite reagent enables systematic monitoring of nitrogen cycle parameters and aids in detecting potentially harmful nitrite accumulations early.
Suitable for
 Routine nitrite testing in freshwater aquariums
 Water quality monitoring in garden ponds
 Use with sera nitrite test kits or comparable test procedures
 Periodic checks during fish stocking, medication, or biofilter cycling
When it may not be suitable
This reagent is formulated specifically for nitrite detection and should not be used as a substitute for tests measuring nitrate, ammonia, pH, or other parameters. It requires following the corresponding test kit instructions for accurate results; using it with incompatible procedures or without calibrated colour comparison standards may yield incorrect readings.
Key specifications
 Form: liquid reagent
 Volume: 250 ml
 Target parameter: nitrite (NO2-)
 Intended use: aquarium and pond water testing
 Compatibility: for use with nitrite test kits and comparable procedures
How to use
Follow the instructions provided with the sera nitrite test kit or the compatible test procedure. Typically, collect the sample in the test tube supplied by the kit, add the specified number of drops or a measured volume of the negative reagent, shake or invert if required, then add any additional reagents as directed. Compare the resulting colour with the colour chart included in the test kit to determine nitrite concentration. Rinse test glassware after use and store the reagent capped in a cool, dark place.
What to consider before purchase
 Ensure compatibility with your nitrite test kit or procedure
 Confirm the required reagent volume and expected number of tests
 Store away from direct sunlight and extreme temperatures
Usage recommendations
Test regularly during initial tank cycling, after introducing new fish, after medication, and as part of routine maintenance. Use fresh reagents and follow kit instructions closely for reliable nitrite readings; if results are unexpectedly high, repeat the test and verify with a second sample before taking corrective action.

## FAQ

### How much does the sera Nitryt reagent 250 ml cost, and is it available for purchase?

The price is 15.49 € (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 03.07.2026 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

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