--- product_id: 47963393 title: "API GH & KH TEST KIT Freshwater Aquarium Water Test Kit 1-Count" brand: "api" price: "£17.38" currency: GBP in_stock: true reviews_count: 13 category: "Api" url: https://www.desertcart.co.uk/products/47963393-api-gh-and-kh-test-kit-freshwater-aquarium-water-test store_origin: GB region: United Kingdom --- # Accurate GH & KH measurement Ideal for weekly water quality checks Includes 2 test solutions & glass tubes API GH & KH TEST KIT Freshwater Aquarium Water Test Kit 1-Count **Brand:** api **Price:** £17.38 **Availability:** ✅ In Stock ## Summary > 💧 Keep your aquarium thriving with precision water testing—because your fish deserve the best! ## Quick Answers - **What is this?** API GH & KH TEST KIT Freshwater Aquarium Water Test Kit 1-Count by api - **How much does it cost?** £17.38 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.co.uk](https://www.desertcart.co.uk/products/47963393-api-gh-and-kh-test-kit-freshwater-aquarium-water-test) ## 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:** Everything you need—solutions, color card, and glass tubes—for hassle-free monitoring. - • **Weekly Wellness Routine:** Make water testing a seamless part of your fish care regimen to ensure thriving aquatic life. - • **User-Friendly & Reliable:** Simple, clear results trusted by thousands of aquarium enthusiasts worldwide. - • **Prevent Fish Stress & Loss:** Stay ahead of invisible water issues that threaten your aquatic ecosystem. - • **Precision Water Hardness Testing:** Pinpoint your aquarium’s GH & KH levels to mimic natural habitats perfectly. ## Overview The API GH & KH Test Kit is a professional-grade freshwater aquarium water test kit designed to accurately measure general hardness (GH) and carbonate hardness (KH). It includes two bottles of testing solution, a color card, and two glass test tubes with caps, enabling easy and reliable weekly monitoring of water quality. This kit helps prevent fish stress and loss by ensuring water hardness matches the natural habitat of your fish, making it an essential tool for any serious aquarium keeper. ## Description From the manufacturer It’s Smart To Be Proactive! The best way to keep your aquarium clean is to maintain good water quality. This will keep your fish strong and vibrant, as well as preventing disease. How Do I Maintain A Healthy Environment? It is important to test your aquarium water weekly to verify good quality in addition to a bi-weekly partial water change of no more than 25% to help reduce toxic buildup, remove debris the filter missed, and replenish the oxygen available to fish. How Do I Take Good Care Of My Aquarium? Feed & observe fish daily Test water quality weekly Change 25% water bi-weekly Restore your ecosystem monthly Feed Your Fish Daily Feed your fish twice daily only the amount of food they can eat in 2 to 3 minutes depending on the species. Some fish such as bottom feeders and algae eaters will need up to 30 minutes to 2 hours. Overfeeding & low quality nutrition cause unconsumed food and more excrement which cloud water and raise harmful ammonia levels, possibly leading to fish loss. Take time to observe fish and the water temperature to ensure they are active & healthy. Test Water Quality Weekly An aquarium is a closed environment and in order for fish to thrive, water must be similar to that which could be found in their natural environment. Poor water quality can cause fish stress, illness and even loss. The 5 common water quality parameters are Ammonia, Nitrite, Nitrate, and pH - all of which may vary over time and all are invisible to the eye which is why it is important to test weekly with API MASTER TEST KITS or API 5-IN-1 TEST STRIPS. It is also a good time to add API STRESS ZYME to keep your aquarium & gravel clean. Change 25% Water Every 2 Weeks In a closed aquarium environment there are no natural rivers or streams to carry away debris and other waste materials. It is important to renew 25% of the aquarium water every two weeks. When you change the water, it is important to know that tap water contains chemicals that make it safe for us to drink but harmful for fish, therefore add a water conditioner such as API STRESS COAT. Restore Your Ecosystem Monthly It is important to change your filter media & clean gravel monthly, however in doing so it can disrupt the fragile ecosystem of your aquarium. Use API QUICK START to strengthen it with ‘beneficial’ nitrifying bacteria that will naturally consume toxic compounds and help prevent fish stress. Also recommended when starting a new aquarium or changing the water. Making A Better Underwater World At API, we understand the rewards and relaxation of fishkeeping because we have a passion for fish too. API offers a range of testing kits, water conditioners, and nutritionally superior food, because we’re dedicated to making a better underwater world. Review: Superb products. - Superb product. API is one of my resources for many of my aquarium essentials. Never had any problem with any of there items. Great value for money, with many products giving you size options for what you need. All products from medicated to water parameters and plant care. These products are made with an ease of understanding for what that purpose is and will help you on your fish keeping journey. Review: Essential for Healthy Fish Tank - This API GH & KH test kit is a must-have for any freshwater aquarium owner. It's easy to use and gives clear, reliable readings for general and carbonate hardness. Keeping these levels balanced is crucial for fish health. Highly recommend for maintaining a stable tank environment ## Features - Causes serious eye damage. - Causes severe skin burns and eye damage. - Causes skin irritation. - May cause an allergic skin reaction. - May cause damage to organs through prolonged or repeated exposure. - May cause respiratory irritation. - Suspected of causing cancer. - Contains one (1) API GH & KH TEST KIT Freshwater Aquarium Water Test Kit, including 2 bottles of testing solution, 1 colour card and 2 glass test tubes with cap - Helps monitor water quality and prevent invisible water problems that can be harmful to fish and plants and cause fish loss - Accurately measures GH & KH in freshwater aquariums - Water hardness is a measure of the dissolved mineral content of water and should match fish natural habitat to prevent fish stress and keep them healthy - Use for weekly monitoring and when water or fish problems appear ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B003SNCHMA | | Batteries Included | No | | Batteries required | No | | Best Sellers Rank | 1,548 in Pet Supplies ( See Top 100 in Pet Supplies ) 4 in Aquarium Test Kits | | Customer Reviews | 4.7 4.7 out of 5 stars (5,523) | | Date First Available | 8 Aug. 2009 | | Item Weight | 70.8 g | | Item model number | 58 | | Number of Items | 1 | | Pet Type | Fish | | Product Dimensions | 6.99 x 4.13 x 13.02 cm; 70.87 g | | Quantity | 1 | | Size | 1 Count (Pack of 1) | | Volume | 1.25 | ## Images ![API GH & KH TEST KIT Freshwater Aquarium Water Test Kit 1-Count - Image 1](https://m.media-amazon.com/images/I/518PHJWONXL.jpg) ![API GH & KH TEST KIT Freshwater Aquarium Water Test Kit 1-Count - Image 2](https://m.media-amazon.com/images/I/91q9ER-WJFL.jpg) ![API GH & KH TEST KIT Freshwater Aquarium Water Test Kit 1-Count - Image 3](https://m.media-amazon.com/images/I/51hXtDFPf0L.jpg) ![API GH & KH TEST KIT Freshwater Aquarium Water Test Kit 1-Count - Image 4](https://m.media-amazon.com/images/I/71GkdCyCuBL.jpg) ![API GH & KH TEST KIT Freshwater Aquarium Water Test Kit 1-Count - Image 5](https://m.media-amazon.com/images/I/81T3-ZFwqBL.jpg) ## Available Options This product comes in different **Style** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Superb products. *by M***S on 23 February 2026* Superb product. API is one of my resources for many of my aquarium essentials. Never had any problem with any of there items. Great value for money, with many products giving you size options for what you need. All products from medicated to water parameters and plant care. These products are made with an ease of understanding for what that purpose is and will help you on your fish keeping journey. ### ⭐⭐⭐⭐⭐ Essential for Healthy Fish Tank *by E***Z on 20 June 2025* This API GH & KH test kit is a must-have for any freshwater aquarium owner. It's easy to use and gives clear, reliable readings for general and carbonate hardness. Keeping these levels balanced is crucial for fish health. Highly recommend for maintaining a stable tank environment ### ⭐⭐⭐⭐⭐ Seems to work *by N***7 on 1 February 2026* Seems to be OK but I don't know how accurate the test results are - I have to rely on them being accurate. ## Frequently Bought Together - API GH & KH TEST KIT Freshwater Aquarium Water Test Kit, 2.5 oz. - API FRESHWATER MASTER TEST KIT 800-Test Freshwater Aquarium Water Master Test Kit, White, Single, Multi-colored - SaltyShrimp Shrimp Mineral GH/KH+ 100g --- ## Why Shop on Desertcart? - 🛒 **Trusted by 1.3+ Million Shoppers** — Serving international shoppers since 2016 - 🌍 **Shop Globally** — Access 737+ million products across 21 categories - 💰 **No Hidden Fees** — All customs, duties, and taxes included in the price - 🔄 **15-Day Free Returns** — Hassle-free returns (30 days for PRO members) - 🔒 **Secure Payments** — Trusted payment options with buyer protection - ⭐ **TrustPilot Rated 4.5/5** — Based on 8,000+ happy customer reviews **Shop now:** [https://www.desertcart.co.uk/products/47963393-api-gh-and-kh-test-kit-freshwater-aquarium-water-test](https://www.desertcart.co.uk/products/47963393-api-gh-and-kh-test-kit-freshwater-aquarium-water-test) --- *Product available on Desertcart United Kingdom* *Store origin: GB* *Last updated: 2026-05-25*