--- product_id: 254785219 title: "Api gh & kh test kit freshwater aquarium water, 4.8 oz." brand: "api" price: "€ 49.44" currency: EUR in_stock: true reviews_count: 5 url: https://www.desertcart.pt/products/254785219-api-gh-and-kh-test-kit-freshwater-aquarium-water-4 store_origin: PT region: Portugal --- # Measures General Hardness (GH) Includes 2 precise test bottles & glass tubes Stabilizes pH via Carbonate Hardness (KH) Api gh & kh test kit freshwater aquarium water, 4.8 oz. **Brand:** api **Price:** € 49.44 **Availability:** ✅ In Stock ## Summary > 💧 Master your aquarium’s chemistry, keep your fish stress-free and thriving! ## Quick Answers - **What is this?** Api gh & kh test kit freshwater aquarium water, 4.8 oz. by api - **How much does it cost?** € 49.44 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.pt](https://www.desertcart.pt/products/254785219-api-gh-and-kh-test-kit-freshwater-aquarium-water-4) ## 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 easy-to-read instructions, 2 test bottles, and durable glass test tubes for reliable results every time. - • **pH Stability Control:** Monitors carbonate hardness to prevent rapid pH swings, ensuring a stable and thriving aquarium environment. - • **Universal Compatibility:** Ideal for all freshwater fish and plants, supporting all life stages with BPA-free, safe materials. - • **Trusted Aquarium Essential:** API’s proven formula with 4.6-star rating and top ranks in fish health supplies—join thousands of savvy aquarists. - • **Precision Water Hardness Testing:** Accurately replicate your fish’s natural habitat to reduce stress and boost health. ## Overview The API GH & KH Test Kit is a professional-grade freshwater aquarium water testing solution that measures General Hardness (calcium and magnesium levels) and Carbonate Hardness (alkalinity) to help you precisely mimic your fish’s natural environment. Featuring two test bottles, glass test tubes, and clear instructions, it stabilizes pH levels to prevent harmful fluctuations, ensuring healthier fish and plants. BPA-free and highly rated, it’s a must-have for every serious aquarist. ## 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 & Fish? Feed & observe fish daily Test water quality weekly Change 25% water bi-weekly Restore your ecosystem monthly Making A Better Underwater World At API, we understand the rewards and relaxation of fishkeeping because we have a passion for fish too. For over 50 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.* *Claims are not verified. Review: recommend - easy to use and accurate. good to monitor hardness in fresh water aquarium 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. ## Features - When Keeping Freshwater Fish And Plants, The General Hardness Gh And Carbonate Hardness Kh Of Aquarium Water Should Match Their Natural Habitat. The Api Gh & Kh Test Kit Helps You Duplicate The Natural Habitat Of Your Fish To Prevent Stress, Keeping Them Healthy - Contains 2 Test Bottles, Easy To Ready Instructions, And Glass Test Tubes - Carbonate Hardness, Also Known As Alkalinity, Is The Measure Of Carbonate And Bicarbonate Concentrations Dissolved In Water. These Minerals Are Present In Municipal, Well, And Bottled Water. The Level Of Carbonate Hardness In Tap And Bottled Water Depends On The Source Of The Water And The Treatment Processes It Has Undergone. Carbonate Hardness Helps Stabilize Ph In The Aquarium. An Aquarium With A Low Kh Level Will Tend To Be Acidic. Aquariums With Very Low Kh Are Subject To Rapid Ph Shifts If Not Monitored Carefully. Water With A High Kh Level Usually Has A High Ph. - General Hardness Is The Measure Of Calcium And Magnesium Ion Concentrations Dissolved In Water. These Minerals Are Present In Municipal, Well, And Bottled Spring Water. The Level Of General Hardness In Tap And Bottled Water Depends On The Source Of The Water And The Treatment Processes It Has Undergone. Hard Water Is High In Calcium And Magnesium, While Soft Water Is Low In These Minerals. ## Technical Specifications | Specification | Value | |---------------|-------| | ASIN | B003SNCHMA | | Allergen Information | BPA-Free | | Batteries Included | No | | Best Sellers Rank | #4,017 in Pet Supplies ( See Top 100 in Pet Supplies ) #21 in Fish Medication & Health Supplies | | Color | multicolor | | Customer Reviews | 4.6 4.6 out of 5 stars (5,506) | | Date First Available | 7 August 2012 | | Item Weight | 70.8 g | | Item model number | 58 | | Number of Items | 1 | | Pet Life Stage | All Life Stages | | Pet Type | Fish | | Product Dimensions | 6.99 x 4.13 x 13.02 cm; 70.87 g | | Quantity | 1 | | Size | 4.8 oz. | | Specific Uses | Active | | Volume | 1.25 | | batteries required | No | ## Images ![Api gh & kh test kit freshwater aquarium water, 4.8 oz. - Image 1](https://m.media-amazon.com/images/I/518PHJWONXL.jpg) ![Api gh & kh test kit freshwater aquarium water, 4.8 oz. - Image 2](https://m.media-amazon.com/images/I/91q9ER-WJFL.jpg) ![Api gh & kh test kit freshwater aquarium water, 4.8 oz. - Image 3](https://m.media-amazon.com/images/I/51hXtDFPf0L.jpg) ![Api gh & kh test kit freshwater aquarium water, 4.8 oz. - Image 4](https://m.media-amazon.com/images/I/71GkdCyCuBL.jpg) ![Api gh & kh test kit freshwater aquarium water, 4.8 oz. - Image 5](https://m.media-amazon.com/images/I/81T3-ZFwqBL.jpg) ## Available Options This product comes in different **Size, Style** options. ## Customer Reviews ### ⭐⭐⭐⭐⭐ recommend *by T***R on 23 July 2025* easy to use and accurate. good to monitor hardness in fresh water aquarium ### ⭐⭐⭐⭐⭐ 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. ### ⭐⭐⭐⭐⭐ API gh and kh testing works well *by B***P on 10 July 2025* Easy to use and readings of both gh and kh very accurate no guessing or matching colours ## 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.pt/products/254785219-api-gh-and-kh-test-kit-freshwater-aquarium-water-4](https://www.desertcart.pt/products/254785219-api-gh-and-kh-test-kit-freshwater-aquarium-water-4) --- *Product available on Desertcart Portugal* *Store origin: PT* *Last updated: 2026-06-21*