--- product_id: 48094123 title: "800 Test Freshwater Aquarium Water Master Test Kit" brand: "api" price: "€ 71.89" currency: EUR in_stock: true reviews_count: 13 category: "Api" url: https://www.desertcart.fr/products/48094123-800-test-freshwater-aquarium-water-master-test-kit store_origin: FR region: France --- # precise color-coded results 5 vital water parameters tested long-lasting reagent bottles 800 Test Freshwater Aquarium Water Master Test Kit **Brand:** api **Price:** € 71.89 **Availability:** ✅ In Stock ## Summary > 🐟 Dive into precision: Master your aquarium’s health like a pro! ## Quick Answers - **What is this?** 800 Test Freshwater Aquarium Water Master Test Kit by api - **How much does it cost?** € 71.89 with free shipping - **Is it available?** Yes, in stock and ready to ship - **Where can I buy it?** [www.desertcart.fr](https://www.desertcart.fr/products/48094123-800-test-freshwater-aquarium-water-master-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 - • **User-Friendly Testing:** Simple drop method with clear color chart for quick, confident readings every time. - • **Proactive Aquarium Care:** Detect invisible water issues early to prevent fish loss and maintain a thriving ecosystem. - • **Reliable & Long-Lasting:** Sealed reagent bottles ensure stable, precise results far beyond test strips’ lifespan. - • **Comprehensive Water Health Check:** Monitor pH, High Range pH, Ammonia, Nitrite & Nitrate with lab-grade accuracy. - • **Trusted by Experts & Enthusiasts:** Top-rated kit with 30,000+ reviews, perfect for serious freshwater aquarium managers. ## Overview The API Master Test Kit is a premium freshwater aquarium testing solution that accurately measures five critical water parameters—pH, High Range pH, Ammonia, Nitrite, and Nitrate—using stable, sealed reagent bottles. Designed for weekly monitoring and troubleshooting, it offers superior precision and longevity compared to test strips, empowering aquarium owners to maintain optimal water quality and prevent fish loss with ease. ## Description From the manufacturer Why be proactive with water treatments? A natural pond has a constant supply of fresh water flowing into it, such as from a stream or spring. Water also flows out of a natural pond, taking fish waste and other toxins with it. This isn’t true for most garden ponds as they are closed systems. Garden ponds also tend to be much smaller than natural ponds, so they do not offer the amount of water per fish that you find in nature. For these reasons, water treatments are necessary to keep water conditions safe for both fish and plant life and for clearer water. Following specific steps each season allows you to create a backyard retreat you’ll enjoy all year long! For more information about what’s needed each season, check out more below. Spring Start Up - Get Your Pond Ready! Its pond startup time! Whether filling a new pond or re-establishing an existing pond, following some simple steps at startup will yield benefits you’ll enjoy all season long. The 3 key steps that must be taken are making your tap water safe, activating the natural pond cycle, and maintaining sparkling clean water to boost fish and plant health. Once the water temperature reaches above 10⁰C, you’ll also want to start feeding your fish again. It is important to take care of all of your plants in the spring with API AQUATIC PLANT MEDIA and API AQUATIC PLANT FOOD TABLETS as they will be the key to success in most ponds! Lastly, monitor the water conditions in your pond with the API POND MASTER TEST KIT, an easy and accurate way to test 4 key water parameters including pH, ammonia, nitrite, and phosphat Summer - Provide Regular Care And Enjoy Your Pond Summer is the time to sit back and enjoy all of your hard work! You’ll need to continue regular care for your pond that includes adding beneficial bacteria like API POND-ZYME and API POND ECOFIX. While everything looks great, you’ll want to closely monitor the water conditions so that you can protect the health of your pond including plants and fish. Algae grows in the presence of sunlight where there is excess nutrients in the pond water for the algae to feed on. API POND ALGAE CURE has been used for over 18 years to effectively control green water algae, string algae, and blanketweed without harming fish or plants. At this time it could be beneficial to do a partial water change, adding API POND STRESS COAT and API POND SALT and fertilizing your pond plants Autumn - Prepare For Winter Performing a few simple steps in the autumn will prepare your fish and plants for the long, cold winter ahead and lay the foundation for a healthy start in the spring. We recommend removing excess organic matter to reduce fish stress during the winter months. Use a net to remove as many leaves as possible. Routine addition of API POND ECOFIX or API POND-ZYME throughout the season promotes healthy water quality and reduces the amount of organic matter you need to remove at the end of the season. It is also important to perform a 25% water change, adding API POND STRESS COAT and API POND SALT to make the tap water safe and to replenish important electrolytes which aid fish during the stressful winter months. Winter – Keep Pond Water Circulating In cooler climates, when the water temperature drops, fish will naturally eat less than at warmer temperatures. Once the water temperature drops below 5⁰C, fish will stop eating and if they have been fed properly through the summer and autumn, they will have ample reserves to survive the rigours of winter. It is also important to ensure your pond has circulation to keep an open area on the ponds surface throughout the winter months to prevent the buildup of toxic gases which can accumulate from the decomposition of organic matter. 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. Review: Very accurate so totally reliable. - I moved away from test strips and bought the API 800 Test Freshwater Master Kit. One of the best decisions I have made for my aquarium. Test strips may look convenient but once the container is opened and the strips are exposed to air the clock is ticking. Moisture and oxygen start degrading the reagents immediately. After about 30 days the accuracy drops off badly. At that point the readings are questionable and you may as well consider them unreliable. For something as important as water quality, that simply is not good enough. The API Freshwater Master Kit solves that problem completely. The reagents are stored in sealed bottles so they remain stable and accurate for a long time. Using it is straightforward. Fill the test tube with tank water to the line, add the correct number of drops from the bottle, cap the tube and shake. For nitrate there is a second bottle and a longer shake but it is still very simple. Wait the specified time, then compare the colour against the chart. That is it. What you get in return is far more reliable information. The colour changes are clearer and the scale is more precise than strips. You can properly track ammonia, nitrite, nitrate and pH rather than relying on vague strip colours that can be difficult to read. Each kit also lasts a very long time because you get a large number of tests from the bottles. It ends up being far better value than constantly replacing strips that degrade quickly. If you want accurate, repeatable readings and a clear picture of what is happening in your tank water, this kit is excellent. Simple to use, dependable and well worth the money. Highly recommended for any serious fish keeper. 🐟 Review: Easier than expected and better than strips - I was recommended this kit by a Knowledgeable fish man in one of my local fish/pet shops. Even over buying what they had in their store (strips). It’s brilliant. Also fees like doing potions. I thought it would be difficult to do but it’s so easy. My fish tank is thriving ## Features - Causes serious eye damage. - Causes serious eye irritation. - Causes severe skin burns and eye damage. - Harmful if swallowed. - Harmful to aquatic life with long lasting effects. - May be corrosive to metals. - May cause respiratory irritation. - Suspected of causing cancer. - Suspected of damaging fertility or the unborn child. - Warning! Do not use together with other products. May release dangerous gases (chlorine). - Contains one (1) API Freshwater master kit 800, including 7 bottles of testing solutions, 1 colour card and 4 glass tubes with cap - Helps monitor water quality and prevent invisible water problems that can be harmful to fish and cause fish loss ## Technical Specifications | Specification | Value | |---------------|-------| | Asin | B000255NCI | | Batteries Included | No | | Batteries Required | No | | Best Sellers Rank | 1,467 in Pet Supplies (See Top 100 in Pet Supplies) 2 in Aquarium Test Kits | | Compatible Devices | Designed for use in freshwater aquariums only | | Customer Reviews | 4.8 4.8 out of 5 stars (30,356) 4.8 out of 5 stars | | Date First Available | 25 Nov. 2009 | | Delivery Information | We cannot deliver certain products outside mainland UK ( Details). We will only be able to confirm if this product can be delivered to your chosen address when you enter your delivery address at checkout. | | Item Model Number | 34 | | Item Weight | 522 g | | Number Of Items | 1 | | Pet Type | Fish | | Product Dimensions | 23.2 x 8.9 x 11.8 cm; 521.63 g | | Quantity | 1 | | Size | One Size | | Special Features | Accurately monitors five most vital water parameters levels in freshwater aquariums: pH, High Range PH, Ammonia, Nitrite and Nitrate | | Volume | 250 Millilitres | ## Images ![800 Test Freshwater Aquarium Water Master Test Kit - Image 1](https://m.media-amazon.com/images/I/61Kd-mEEjXL.jpg) ## Available Options This product comes in different **Style** options. ## Questions & Answers **Q: How long does it last you and do I need to buy a syringe too?** A: A syringe is helpful for filling the test tubes. I would get one that is at lest 20 ml that way you can fill the syringe once and use it to fill all four test tubes. In the freshwater kit you get 37ml of each test solution except the nitrate one for which you only get 30 ml. The number of drops you use for each test varies, taking one drop as 0.05 ml gives the following approx number of tests: pH: 245 tests pH High Range: 148 tests Ammonia: 92 tests Nitrite: 148 tests Nitrate: 60 tests **Q: Is it single use?? if not how many times can you test??** A: It is a whole kit with small bottles for each test. You can do probably around 40-60 tests for each of the water parimitars with this kit. **Q: What is the expire date on this item please** A: Have just had this product delivered July 2020 with a best before date of December 2024, so good shelf life and only drops needed for each test, weekly use seems to be the recommended **Q: Can I get new test tubes?** A: Contact API or your fish pet shop - they should know; the kit has 4 tubes for the 4 tests. Or do as I did - instead of buying refill of solutions purchase another kit. ## Customer Reviews ### ⭐⭐⭐⭐⭐ Very accurate so totally reliable. *by D***N on 11 March 2026* I moved away from test strips and bought the API 800 Test Freshwater Master Kit. One of the best decisions I have made for my aquarium. Test strips may look convenient but once the container is opened and the strips are exposed to air the clock is ticking. Moisture and oxygen start degrading the reagents immediately. After about 30 days the accuracy drops off badly. At that point the readings are questionable and you may as well consider them unreliable. For something as important as water quality, that simply is not good enough. The API Freshwater Master Kit solves that problem completely. The reagents are stored in sealed bottles so they remain stable and accurate for a long time. Using it is straightforward. Fill the test tube with tank water to the line, add the correct number of drops from the bottle, cap the tube and shake. For nitrate there is a second bottle and a longer shake but it is still very simple. Wait the specified time, then compare the colour against the chart. That is it. What you get in return is far more reliable information. The colour changes are clearer and the scale is more precise than strips. You can properly track ammonia, nitrite, nitrate and pH rather than relying on vague strip colours that can be difficult to read. Each kit also lasts a very long time because you get a large number of tests from the bottles. It ends up being far better value than constantly replacing strips that degrade quickly. If you want accurate, repeatable readings and a clear picture of what is happening in your tank water, this kit is excellent. Simple to use, dependable and well worth the money. Highly recommended for any serious fish keeper. 🐟 ### ⭐⭐⭐⭐⭐ Easier than expected and better than strips *by A***Y on 30 May 2026* I was recommended this kit by a Knowledgeable fish man in one of my local fish/pet shops. Even over buying what they had in their store (strips). It’s brilliant. Also fees like doing potions. I thought it would be difficult to do but it’s so easy. My fish tank is thriving ### ⭐⭐⭐⭐⭐ Best kit for overall price and good accuracy. Few caveats but still highly recommend. *by M***R on 29 May 2017* The only freshwater master kit i will use. Test strips i never used due to there poor accuracy. There are some other brands like Seachem for example that do great water testing products but much more expensive to. If you want good accuracy for a reasonable price that will last a reasonably long time then overall value and quality is definitely given to the API Freshwater Master Kit. You can perform the following tests with this kit: - pH - low range - pH - high range - Ammonia - Nitrite - Nitrate Comes with easy to follow instructions and colour chart. The most annoying are the test tubes, i always end up breaking them and having to buy spares, i also hate they are push caps and not screw on as you have to keep your thumb on top of the cap when shaking as it tends to leak out otherwise, i also wish the case layout was better as well as it's a bit annoying and fiddly specially the position of the test tubes. I also purchased the API liquid Kh and Gh kit to make it a true master test kit. I think they should be included as standard as this is called a master test kit after all. Make sure you shake the plastic liquid bottles very well before using, i shake longer than the instructions state to ensure it's mixed well, specially the nitrate bottle as it's very thick formula and prone to giving inaccurate readings simply because the bottle was not shaked enough before using, so take note shake and shake again. I recommend this kit for any fish keeper whether you are newbie or advanced user, this kit is suitable for most peoples needs. I tend to only test frequently when cycling a tank and for approx 6 months after cycling complete whilst beneficial bacteria still colonizes in the filter, i don't test often from then on as i find observing the tank and fish can give you good indicators of problems, but nonetheless still a great kit to have to hand for as and when needed. Check readings in natural daylight if possible as can sometimes be hard to judge colour of tested water against colour chart. Best kit for overall price accuracy and price. Highly recommend. Tips: - Check expiry date is well in to the future on case when it arrives as they last ages. - I find placing the colour chart up against a window with natural daylight (but not direct sunlight) and then placing the tube by the side of the test i'm testing enables me personally to take a better reading. - Another way some people find easier is to place the colour chart down flat on a surface in a room with natural daylight, then remove cap from test tube and then place the testing tube on top of the colour chart and test they are testing for, then look straight down the test tube and compare colour. - Some people complain of the colour in the test tube changing over time and not sure which reading was correct, this will happen hence why it's important to follow instructions. If for example you are told to compare the test tube with colour chart after 5 minutes, then ensure you compare after 5 minutes and not for example 10 minutes, as overtime the colour will continue to change and people then get confused which is the correct reading. - Shake the Nitrate bottles as it's very thick formula and prone to giving people false readings, read the instructions very carefully, a number of people do the Nitrate test wrong and get inconsistent inaccurate readings. You must shake this bottle excessively. I always shake the bottles longer than the instructions state to ensure they've been shaken enough, if you don't shake them enough you can end up with inaccurate false readings. ## Frequently Bought Together - API FRESHWATER MASTER TEST KIT 800-Test Freshwater Aquarium Water Master Test Kit, White, Single, Multi-colored - PAIZOO Fish Tank Digital Thermometer Accurate LED Display to ±0.9°F Tank Thermometer Aquarium Temperature Measurement Suitable for Fish, Axolotl, Turtle or Aquatic - Tetra Water Cleaner Gravel Siphon for Aquariums, Easily Clean Freshwater Aquariums --- ## 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.fr/products/48094123-800-test-freshwater-aquarium-water-master-test-kit](https://www.desertcart.fr/products/48094123-800-test-freshwater-aquarium-water-master-test-kit) --- *Product available on Desertcart France* *Store origin: FR* *Last updated: 2026-06-18*