GH & KH Test Kit for Freshwater Aquariums, 1 Kit

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.

Works very well, very simple to use to get accurate results

Seems to be OK but I don't know how accurate the test results are - I have to rely on them being accurate.

Easy to use and package well, instructions are a bit of a mess and could have been designed better but you only really need them once, I know companies like to provide as many languages as possible but please dont print them all on 1 huge A3 sized sheet. Feel cheap and lazy design when you want the customer to fully understand how to use a product! That said its works amazing and give you the information you need and the peace of mind to what your KG and GH levels are, I would suggest you do the test twice in the same day for best results and also count carefully when adding drops, if you lose count you need to retest. Nice small bottles like the API master kit so keeps on brand and for how often you will need to use it the value is amazing. Useful for both fresh water and reef tanks

Great item to test ph levels in water, especially when tap water is soft water

Never failed. I always have this testing kit on hand.

I've found this test to be easy to use and it is fun observing the colour changes. My tapwater and most clean local water sources seem to be rather hard at 10 degrees GH. I am using collected rainwater (measuring under 2 degrees GH) to dilute my tapwater and bring the hardness down. I did ask a friend to bring me water in a container as his water is soft at 3 degrees GH. However the pH of his water is high at 7.8 and as my fish prefer soft acid conditions I think a pH of 7.8 may be undesirable. I'm unsure why I should measure KH as well but I have done so for completeness and this test is just as simple.

Great value for accurate results. The instructions can be abut misunderstood but after searching some forums online, it’s easy to understand.

easy to use and accurate. good to monitor hardness in fresh water aquarium

Easy to use and readings of both gh and kh very accurate no guessing or matching colours

Muy bien producto a precio racionable, dar bien mediciones comprobado contra otras test kits mucho mas caro y todos muestra la misma nivel de GH y KH. Muy facil de usar aunque con agua muy blanda como el mio hay que mirar desde arriba contra algo blanco para ver el color de inicio en test GH.

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!

genuine product and works as expected. my last GH kit (same brand) died after 2 years so the GH reagent does expire. Kh from the same box is going strong. I'm getting more use out of the GH and more sensitive readings by a reverse titration. one drop of reagent in a test tube, then drip water using a syringe into the test tube until it turns orange. GH= 5ml/(dripped water (ml)) . works very well for high gh 6-12 but requires a little math and becomes less sensitive at very high gh.