---
product_id: 1780654
title: "API NITRATE 90-Test Freshwater and Saltwater Aquarium Water Test Kit"
price: "KD 6.41"
currency: KWD
in_stock: true
reviews_count: 8
url: https://www.desertcart.com.kw/products/1780654-api-nitrate-90-test-freshwater-and-saltwater-aquarium-water-test
store_origin: KW
region: Kuwait
---

# works for fresh & saltwater 90 precise nitrate tests fast, easy weekly monitoring API NITRATE 90-Test Freshwater and Saltwater Aquarium Water Test Kit

**Price:** KD 6.41
**Availability:** ✅ In Stock

## Summary

> 🧬 Keep your aquarium thriving with precision and ease—don’t let invisible threats sneak in!

## Quick Answers

- **What is this?** API NITRATE 90-Test Freshwater and Saltwater Aquarium Water Test Kit
- **How much does it cost?** KD 6.41 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.com.kw](https://www.desertcart.com.kw/products/1780654-api-nitrate-90-test-freshwater-and-saltwater-aquarium-water-test)

## Best For

- Customers looking for quality international products

## Why This Product

- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Trusted by Thousands:** Join over 3,000 happy users with a 4.7-star rating—because your fish deserve the best.
- • **Comprehensive Testing Kit:** Includes 2 bottles of solution, color cards, and a capped test tube for reliable, mess-free testing.
- • **Accurate Nitrate Detection:** Pinpoint nitrate levels from 0-160 ppm to keep your aquatic ecosystem balanced.
- • **Prevent Algae & Fish Stress:** Stay ahead of harmful algae growth and invisible water issues that threaten fish health.
- • **Dual Environment Compatibility:** Perfectly designed for both freshwater and saltwater aquariums—versatility that fits your setup.

## Overview

The API NITRATE 90-Test Kit offers fast, accurate nitrate testing for both freshwater and saltwater aquariums, detecting levels from 0 to 160 ppm. Equipped with two solution bottles, color cards, and a capped test tube, it enables weekly monitoring to prevent harmful algae growth and maintain optimal fish health. Trusted by thousands with a 4.7-star rating, this kit is essential for proactive aquarium care.

## Description

Keep your fish healthy and thriving by testing your aquarium water's NO3 levels regularly with this easy-to-use API NITRATE TEST KIT for freshwater and saltwater aquariums. Testing water parameters weekly helps prevent invisible water problems that can be harmful to fish. When left uncorrected, high nitrate in aquarium water can lead to a build-up of organic pollutants and poor fish health. Testing is fast, easy, and accurate. The API NITRATE TEST KIT for freshwater and saltwater aquariums tests for harmful nitrate levels from 0-160 ppm. This product comes with one nitrate bottle, one capped test tube, one instruction manual and one color card. The API NITRATE TEST KIT for freshwater and saltwater aquariums Test Kit can be used in freshwater and saltwater aquariums. With API aquarium products, it’s easy to keep a beautiful saltwater, freshwater or reef aquarium. For almost 60 years API has developed premium solutions with proven and effective results for your family and ours. API offers a range of testing kits, water conditioners, and nutritionally superior food, because we’re dedicated to making a better underwater world. They work to provide a safe, hospitable environment for fish such as tropical community fish, cichlids, goldfish and more. At API, we understand the rewards and relaxation of fishkeeping because we have a passion for fish too.

Review: Works perfectly fine! - This test works perfectly fine. If people say it doesn't work then they're doing it wrong, just be sure to follow the instructions. It's pretty quick to use and last for quite some time so it's totally worth it, plus the test strips are not very accurate.
Review: Good product, will buy again as needed. - This product works very accurately. Nice to be able to buy this separately and not purchase the whole kit. More expensive then the strips but I trust this process.

## Features

- Contains one (1) API NITRATE 90-Test Freshwater and Saltwater Aquarium Water Test Kit, including 2 bottles of testing solution, 2 color cards and 1 test tube with cap
- Helps monitor and adjust nitrates and prevent invisible water problems that can be harmful to fish
- Detects high nitrate levels from 0-160 ppm
- Prevents algae growth that can be damaging to fish health
- Use for weekly monitoring and when water or fish problems appear

## Technical Specifications

| Specification | Value |
|---------------|-------|
| Customer Reviews | 4.7 out of 5 stars 3,148 Reviews |

## Images

![API NITRATE 90-Test Freshwater and Saltwater Aquarium Water Test Kit - Image 1](https://m.media-amazon.com/images/I/610ySfkzyHL.jpg)

## Available Options

This product comes in different **Size** options.

## Questions & Answers

**Q: Is this test necessary and is it easy to use for a novice?  I received a 15 gallon as a present but I did not know it would be so much work and money.**
A: The test is easy to use; just remember to empty and rinse your vial after use, and rinse the vial with tank water (I dip some out with a small clean Dixie cup, then pour it into the vial and discard the water into the sink) before filling with water to do your test. And I examine the results under sunlight or a daylight spectrum fluorescent.If  you are doing regular water changes(weekly and/or as your water tests say to), and keeping the tank clean, you will not have to use this test often. Do not overfeed, and do not overload your tank (put too many fish or put too big of a fish in it). At the start you should have ammonia and nitrite test kits, and test daily to see what is going on while your filter cycles, then as a doublecheck for water quality. And yes it can take a month or so for your filter to cycle.Goldfish have a reputation for being a cheap fish, and easy to take care of... I breed and keep fancies; and honestly, 3 goldfish per 55 gallon aquarium!  A mature goldfish is about the size of an adult fist in body; and it is hard to keep water quality good for three that size in that size aquarium. In a 15 gallon no more than two small ones and they are going to grow and outgrow your tank. Half a dozen guppies or so will work, or a couple of mollies; or one betta.  Bettas need water about 85f, good quality, and at least a 10 gallon aquarium.

**Q: Hello I ordered this the 21st of April why is it taking so long to ship it ?**
A: Supply chains could be delayed due to Covid?

**Q: Does this include Nitrate Bottle #1 and Bottle #2?**
A: Ooops! Sorry. Yes it does include Bottle #1 and #2!

**Q: Putting 2.5ml & 5 drops of #1 & #2 each will get the same result? Will color continue to change after the 5 minute wait? Why cap leaks when I shake?**
A: Shake both bottles for one minute then add 10 drops of each to your test vial.  Then shake 30 seconds.   Any other questions should be directed to API. Not a consumer nor a seller

## Customer Reviews

### ⭐⭐⭐⭐⭐ Works perfectly fine!
*by F***A on February 1, 2026*

This test works perfectly fine. If people say it doesn't work then they're doing it wrong, just be sure to follow the instructions. It's pretty quick to use and last for quite some time so it's totally worth it, plus the test strips are not very accurate.

### ⭐⭐⭐⭐⭐ Good product, will buy again as needed.
*by K***A on November 25, 2025*

This product works very accurately. Nice to be able to buy this separately and not purchase the whole kit. More expensive then the strips but I trust this process.

### ⭐⭐⭐⭐⭐ Great Test Kit for the price, it gives you a pretty good estimate of your Nitrates when they are high.
*by R***G on March 26, 2016*

API kits are fairly accurate for the price, I highly recommend them for salt water aquarium owners that need and should have at least 2 kits of every important test type so they can cross reference results if they feel something is wrong with a particular test result. API fills that niche perfectly with pretty accurate easy to use kits that cost a quarter the price of the more accurate ones like Salifert, ELOS and Red Sea Pro. The API Nitrate Kit is as simple as it gets, just fill the vial to the marker or better yet use a syringe and add 5ml as directed. Then add 10 drops of reagent "A". swirl for a bit then shake reagent "B" for 30 seconds very vigorously and add 10 drops of that. Shake the whole thing for one minute vigorously and then wait 5 minutes to get a result. IMPORTANT NOTE: If you forget to shake reagent "B" you might as well throw the whole bottle of reagent out. This solution separates out in the container after a few hours into layers of different chemicals. If you don't shake it, you will be dripping out 10 drops of just one of those chemicals and remaining mixture will be compromised. The end result is that the next time you use it and shake it up properly the typically result is a lower reading than normal. Just remember to always shake reagent B properly for 30 seconds and you wont have any problems. If your Nitrates go down to reading Zero on the API kit, then it's time to move to a more accurate kit that is designed to read very low Nitrate levels. If your keeping a SPS Reef Tank you need the Nitrates to be near Zero and the API kit will not be accurate enough to read the small amounts that may be in your aquarium. For FOWLR Tanks, Nitrate is not as not as big of an issue, so an API kit or two is all you will probably need.

## Frequently Bought Together

- API NITRATE 90-Test Freshwater and Saltwater Aquarium Water Test Kit
- API GH & KH TEST KIT Freshwater Aquarium Water Test Kit, 2.5 oz.

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*Product available on Desertcart Kuwait*
*Store origin: KW*
*Last updated: 2026-02-23*