---
product_id: 4435654
title: "CALCIUM TEST KIT Saltwater Aquarium Water 1-Count Test Kit"
brand: "api"
price: "€ 13.88"
currency: EUR
in_stock: true
reviews_count: 13
category: "Api"
url: https://www.desertcart.ie/products/4435654-calcium-test-kit-saltwater-aquarium-water-1-count-test-kit
store_origin: IE
region: Ireland
---

# Measures calcium 0-4 ppm accurately 2 solution bottles for precise testing Quick weekly monitoring kit CALCIUM TEST KIT Saltwater Aquarium Water 1-Count Test Kit

**Brand:** api
**Price:** € 13.88
**Availability:** ✅ In Stock

## Summary

> 🌊 Keep your reef radiant — don’t let calcium slip away!

## Quick Answers

- **What is this?** CALCIUM TEST KIT Saltwater Aquarium Water 1-Count Test Kit by api
- **How much does it cost?** € 13.88 with free shipping
- **Is it available?** Yes, in stock and ready to ship
- **Where can I buy it?** [www.desertcart.ie](https://www.desertcart.ie/products/4435654-calcium-test-kit-saltwater-aquarium-water-1-count-test-kit)

## Best For

- api enthusiasts

## Why This Product

- Trusted api brand quality
- Free international shipping included
- Worldwide delivery with tracking
- 15-day hassle-free returns

## Key Features

- • **Complete Testing Kit:** Includes 2 test solutions and capped test tube for easy, mess-free use
- • **Trusted Legacy Brand:** API’s 60 years of expertise ensures reliable, professional-grade aquarium care
- • **Effortless Weekly Routine:** Simple, fast testing keeps your reef thriving without hassle
- • **Prevent Invisible Threats:** Early detection of calcium drops prevents coral stress and aquarium imbalance
- • **Precision Calcium Tracking:** Accurately detects calcium levels critical for coral & crustacean growth

## Overview

The API CALCIUM TEST KIT is a professional-grade, easy-to-use solution designed for saltwater reef aquariums. It accurately measures calcium levels from 0-4 ppm using two test solutions and a capped test tube, enabling weekly monitoring to prevent calcium depletion that can harm corals and crustaceans. Trusted by aquarists for over 60 years, this kit ensures your aquatic ecosystem stays balanced and vibrant.

## Description

Keep your aquatic life healthy and thriving by testing your aquarium water's calcium levels regularly with this easy-to-use API CALCIUM TEST KIT for aquariums.Testing water parameters weekly helps prevent invisible water problems that can be harmful to fish. Calcium is one of the most important elements in a reef aquarium. Reef invertebrates such as corals, crustaceans, mollusks and even some types of encrusting algae need calcium to grow and remain healthy. Over time, calcium levels drop as invertebrates use calcium in aquarium water. The API CALCIUM TEST KIT measures calcium levels as low as 20mg/L. It contains two calcium test bottles, capped test tube and instructions. For use in reef 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: helpful tool for maintaining a healthy tank environment - I recently started using the API GH & KH Test Kit for my freshwater aquarium, and I must say it has been an incredibly helpful tool for maintaining a healthy tank environment. Here’s a detailed review based on my experience: **Ease of Use:** The test kit is very straightforward and user-friendly. The included instructions are clear and easy to follow, even for beginners. Testing both General Hardness (GH) and Carbonate Hardness (KH) takes just a few minutes, and the color changes in the water make it easy to get accurate results. **Accuracy:** The API test kit provides reliable and consistent readings. I compared the results with a digital meter, and they matched up perfectly. Knowing the GH and KH levels helps me adjust my water chemistry for optimal conditions, especially for sensitive fish like cichlids and shrimp. **Functionality:** Having a tool that measures both GH and KH in one kit is incredibly convenient. GH helps monitor essential minerals for fish health, while KH is crucial for stabilizing pH levels. This kit makes it easy to detect changes early, helping prevent pH swings or stress in my fish. **Value for Money:** For the price, you get a high-quality, reliable kit that will last quite a while. The included bottles have enough solution for numerous tests, making it a cost-effective option for regular water monitoring. **Overall Impressions:** The **API GH & KH Test Kit** is a must-have for any freshwater aquarium enthusiast. It’s easy to use, highly accurate, and helps ensure your water parameters are within the right range for your fish and plants to thrive. I highly recommend it for hobbyists of all experience levels. **Rating: 5/5** Reliable, accurate, and easy-to-use water testing for a healthy aquarium!
Review: Definitely a need if you keep fish - Truly a necessity, I'm doing a fish in cycle and have had the tank going for about a week now and my ammonia just tested to around 4 (really bad), did a 70% change and got it down to 1-2 and will continue doing small changes until my tank is cycled. My fish and snail were acting perfectly normal too so it was definitely a surprise!

## Features

- Contains one (1) API CALCIUM TEST KIT Saltwater Aquarium Water 1-Count Test Kit, including 2 bottles of testing solution and 1 test tube with cap
- Helps monitor calcium and prevent invisible water problems that can be harmful to coral & crustaceans
- Accurately detects calcium levels from 0-4 ppm
- Prevents low levels of calcium which inhibit corals and crustaceans growth
- Use for weekly monitoring and when water or aquatic life problems appear

## Technical Specifications

| Specification | Value |
|---------------|-------|
| ASIN | B0006JDWHI |
| ASIN  | B0006JDWHI |
| Best Sellers Rank | #2,134 in Pet Supplies ( See Top 100 in Pet Supplies ) #3 in Aquarium Test Kits |
| Brand Name | API |
| Color | clear |
| Customer Reviews | 4.6 4.6 out of 5 stars (13,233) |
| Date First Available | June 20, 2004 |
| Date First Available  | June 20, 2004 |
| Department | men, women |
| Department  | men, women |
| Directions | Monitoring calcium levels is essential for keeping a successful reef aquarium. Corals and reef invertebrates, such as shrimp, crabs, mollusks, and encrusting algae require calcium to grow and remain healthy. The calcium level drops as it is used by invertebrates or as it reacts with excess phosphate. Having an adequate calcium level is not enough to achieve healthy coral growth, because the growth… |
| Is Discontinued By Manufacturer  | No |
| Item Dimensions LxWxH | 2.75 x 1.63 x 5.13 inches |
| Item Package Dimensions L x W x H | 4.1 x 2.8 x 1.7 inches |
| Item Weight | 68.04 Grams |
| Item model number | 69L |
| Item model number  | 69L |
| Manufacturer | Mars Fishcare |
| Manufacturer  | Mars Fishcare |
| Manufacturer recommended age  | 1 month and up |
| Material | Plastic |
| Model Name | SaltWater CALCIUM TEST KIT |
| Number of Items | 1 |
| Product Dimensions  | 2.75 x 1.63 x 5.13 inches; 2.4 ounces |
| Size | 1 Count |
| Style | Aquarium Water Testing |
| Target Audience Keyword | fish |

## Images

![CALCIUM TEST KIT Saltwater Aquarium Water 1-Count Test Kit - Image 1](https://m.media-amazon.com/images/I/61r4L5M4AzL.jpg)

## Customer Reviews

### ⭐⭐⭐⭐⭐ helpful tool for maintaining a healthy tank environment
*by R***O on December 17, 2024*

I recently started using the API GH & KH Test Kit for my freshwater aquarium, and I must say it has been an incredibly helpful tool for maintaining a healthy tank environment. Here’s a detailed review based on my experience: **Ease of Use:** The test kit is very straightforward and user-friendly. The included instructions are clear and easy to follow, even for beginners. Testing both General Hardness (GH) and Carbonate Hardness (KH) takes just a few minutes, and the color changes in the water make it easy to get accurate results. **Accuracy:** The API test kit provides reliable and consistent readings. I compared the results with a digital meter, and they matched up perfectly. Knowing the GH and KH levels helps me adjust my water chemistry for optimal conditions, especially for sensitive fish like cichlids and shrimp. **Functionality:** Having a tool that measures both GH and KH in one kit is incredibly convenient. GH helps monitor essential minerals for fish health, while KH is crucial for stabilizing pH levels. This kit makes it easy to detect changes early, helping prevent pH swings or stress in my fish. **Value for Money:** For the price, you get a high-quality, reliable kit that will last quite a while. The included bottles have enough solution for numerous tests, making it a cost-effective option for regular water monitoring. **Overall Impressions:** The **API GH & KH Test Kit** is a must-have for any freshwater aquarium enthusiast. It’s easy to use, highly accurate, and helps ensure your water parameters are within the right range for your fish and plants to thrive. I highly recommend it for hobbyists of all experience levels. **Rating: 5/5** Reliable, accurate, and easy-to-use water testing for a healthy aquarium!

### ⭐⭐⭐⭐⭐ Definitely a need if you keep fish
*by A***A on January 8, 2026*

Truly a necessity, I'm doing a fish in cycle and have had the tank going for about a week now and my ammonia just tested to around 4 (really bad), did a 70% change and got it down to 1-2 and will continue doing small changes until my tank is cycled. My fish and snail were acting perfectly normal too so it was definitely a surprise!

### ⭐⭐⭐⭐⭐ A must-have if you have pet shrimp.
*by C***1 on January 13, 2026*

GH KH testing is crushal for a shrimp and or a fish tank easy to use.

## Frequently Bought Together

- API Calcium Test Kit Saltwater Aquarium Water 1-Count Kit, 69L (69L)
- API KH Carbonate Hardness Test Kit, multicolor

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*Product available on Desertcart Ireland*
*Store origin: IE*
*Last updated: 2026-01-26*