• 4,9 out of 5 in the shop
  • Europe's largest koi hall in Mönchengladbach
  • Pond construction with our own team

Details

All About the Product

Product description

Colombo NO2 Test – Nitrite test for clear pond water

The Colombo NO2 Test is a precise drop test for the reliable determination of the nitrite level, for healthy pond water, with easy application, ideal for water analysis and safe pond care.

Nitrite (NO2) is highly toxic to fish and should not be detectable in the pond. Use this test to check your water quality quickly and reliably.

One pack is sufficient for approx. 40 tests.

 

 

Who is the Colombo NO2 Test suitable for?

🐠 For koi and garden pond owners
🌱 If elevated nitrite levels are suspected
💧 For regular monitoring of water quality

 

 

⭐️ Benefits of the Colombo NO2 Test
  • Precision – Exact measurement of the nitrite level
  • Control – Early detection of dangerous levels
  • Simplicity – Quick and easy drop test
  • Safety – Protects fish from nitrite poisoning
  • Yield – Approx. 40 tests per pack
Technical specifications
At a glance

Drop test for NO2 (nitrite), sufficient for approx. 40 tests.

Application and Dosage
Application
Apply regularly when setting up a new pond, after starting the filter, or if fish exhibit abnormal behavior.
Dosage
Take a water sample using the enclosed test tube and add the test reagent according to the instructions. After the specified waiting time, compare the resulting color with the enclosed color chart to accurately read the NO2 value. Regular monitoring is particularly important for newly established ponds or after filter changes.

What buyers say

What customers say about Koi-Area

4,9 in the entire shop from 281 reviews
Hand feeding koi by the pond edge

Before you order

Frequently Asked Questions

When will it arrive?

Ships from Germany, usually within 2 to 4 business days. Individual items are reproduced upon order – in that case, it takes about 10 to 14 business days. The estimated delivery date is shown at the top of the checkout area.

How much is shipping?

Within Germany €5.90 up to 30.9 kg, tiered above that. To Austria, Belgium, Luxembourg and the Netherlands from €7.50, to Denmark from €13.90 – each tiered by weight.

Can I pick it up from you?

Yes, free in Mönchengladbach, Tomphecke 25. Monday, Wednesday, and Friday from 10 am to 5 pm. Just add it to your cart and select pickup at checkout.

I'm not sure if this is suitable for my pond.

Then call us before you order: +49 152 27783926, Monday to Friday from 9 am to 3 pm. You’ll speak with someone who keeps koi and builds pond systems themselves. If a product isn’t right for your setup, we’ll tell you.

Can I return it if it doesn't fit after all?

The statutory 14-day right of withdrawal applies to equipment, accessories, and unopened goods. For hygiene reasons, we cannot accept returns of opened food and grooming products.

How do I pay?

PayPal, Klarna, Apple Pay, Shop Pay, credit card and the other payment methods you see at checkout. You can also pay in person when picking up your order.

Newsletter

News, auctions and new koi from Japan

What’s new in the showroom, when the next live auction takes place, and which koi have just arrived from Japan.

Can be canceled at any time. Our Privacy Policy applies.

Community

Over 17,000 people follow us on social media

We’ll show you what’s happening at the trade show—and you show us your ponds. We can answer your questions faster there than over the phone.

Follow us on @koiarea.de