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Keep your fish healthy and thriving by testing your aquarium water's GH levels regularly with this easy-to-use API GH & KH TEST KIT for freshwater aquariums. Testing water parameters weekly helps prevent invisible water problems that can be harmful to fish. Water hardness is a measure of the dissolved mineral content of water. There are two types: the general hardness (GH) and carbonate hardness (KH). When keeping freshwater fish and plants, the GH and the KH of aquarium water should match their natural habitat. The API GH & KH TEST KIT helps aquarists duplicate the natural habitat of their fish, as well as detect low KH levels, which can lead to rapid and wide pH shifts, stressing fish. API GH & KH TEST KIT contains KH test bottle, GH test bottle, instructions and two capped test tubes.
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.
Chris
Reviewed in the United States on March 5, 2025
these worked great. made it very easy to dial in tank water.
Jeffrey Williams
Reviewed in the United States on February 16, 2025
Works great, what else can you ask for?
Sarah
Reviewed in the United States on February 13, 2025
Much better than the API test strips! This test kit was absolutely worth the money.
Smokeymike
Reviewed in the United States on February 1, 2025
Very easy to test and adjust aquarium water ph
Dachshund
Reviewed in the United States on January 27, 2025
Works great and easy to read. A must have for starting or maintaining an aquarium. Keep in mind d this is only for ammonia.
Don Gray
Reviewed in the United States on June 10, 2024
I do use APIs master liquid test kit and felt I also needed to test GH and KH too which the master kit didnt have.The tests work fine although it threw me off a bit in that these tests work by counting the number of drops it takes to make the 5ml of water change colors instead of a fixed number of drops and determine the color like the way the master tests do.I really miss the glass test tubes they used to provide. The plastic tubes they now provide can be stained with chemicals over time and the caps get broken off. Usually the plastic tubes are done for long before using all the test liquids. Also the 5ml line on these plastic tubes are hard to see. Of course the good thing is that they dont break as easily as the glass ones did. But at least you get new tubes with new test kits.My city tap water has periods of very hard and sometimes only minorly hard water with a pH changing from 7.4 to 8.0 depending on the season and city's ever changing procedures. Sometimes it can be one way on a Monday and by Friday the tap water can be very different. This kit lets me know when I need to do a bit of chemical doping to bring tap water more to where my tanks should be.The more you know about your water quality, the more you can make plant and fish environments comfotable for them.
Marian
Reviewed in India on March 28, 2024
Its a must have for all fish keepers.
Renato
Reviewed in the United States 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!
Mohamed
Reviewed in Saudi Arabia on February 14, 2023
اسوء بائع تعاملت معه المنتج غير سليم تاريخ انتهاء قريب تاخير في الاستلام جدالا احد يتعامل معه
Sarina
Reviewed in the United States on December 2, 2023
This is about the easiest phosphate test kit I have ever used, and the company that makes them has really great customer service. One of the test tubes arrived broken (not a huge deal, there are two in the package) so I reached out to the customer service email to see if they had extras available for purchase. They took a while to get back to me, but were very apologetic about the wait and went above and beyond to make it right. They sent me a brand new test kit, and a hand-written note expressing their apologies for taking a few extra days to get back to me.I, myself, work in customer service, so I have pretty high standards for how I am treated as a customer. This company exceeded my expectations and then some, and the product they make is, in my humble opinion, one of the best available.I can't wait to try some of their other products, because I really do believe that if I ever have any issues they will be sure to make it right. I actually haven't really had issues with this phosphate test, it seems very accurate and the user experience is significantly better than competing tests. It's easy to read, with a nice, clear color card, and very clear instructions. A+ product, A+ customer experience. Well done!
Customer
Reviewed in the United Arab Emirates on August 7, 2022
The scale only goes up to 7.6, so useless for a cichlid tank.The pH up/down instructions tell you how much to add, but not what the expected change is. My pH was high off the scale (blue), but there i no way to know how high or how much acid to add.
Kausik Das
Reviewed in India on February 13, 2022
This is an essential test kit for fish keeping as it will determined the general hardness and carbonate hardness in the water. I use ro water for my fresh water tanks which gives the pure form of water. Then I mix general hardness enhancing solution like seachem equilibrium or seachem replenish to make water with desired gh level. Then I use seachem alkaline buffer and acid buffer accordingly to maintain the proper carbonate hardness and ph for the specific species tank I'm using the water. This kit comes handy in checking the final gh and kh levels before adding the water in the tanks..
Cliente
Reviewed in Italy on June 21, 2018
Di certo non sarò stata attenta ma se si chiama "api strisce reattive 5 in 1" può essere che uno pensa di acquistare un test per la misurazione di 5 elementi diversi e non, solo per la misurazione del ph. Se volete più stelle cambiategli il nome. L ho acquistato ma non me ne faccio niente, soldi, anche se pochi, buttati.
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