







🐠 Keep your fish thriving with precision water testing—don’t let hidden water issues steal your aquatic peace!
The API GH & KH Test Kit is a compact, easy-to-use freshwater aquarium water testing solution that accurately measures general hardness (GH) and carbonate hardness (KH). It includes two bottles of testing solution and two capped test tubes, enabling quick weekly monitoring to maintain optimal water conditions, prevent pH fluctuations, and ensure a healthy environment for fish and plants. Trusted by aquarists for over 60 years, this kit is essential for replicating natural habitats and avoiding stress-related fish loss.













| ASIN | B003SNCHMA |
| ASIN | B003SNCHMA |
| Best Sellers Rank | #1,718 in Pet Supplies ( See Top 100 in Pet Supplies ) #3 in Aquarium Test Kits |
| Brand Name | API |
| Color | DAA |
| Customer Reviews | 4.6 4.6 out of 5 stars (13,282) |
| Date First Available | June 20, 2004 |
| Date First Available | June 20, 2004 |
| Department | Unisex-Adult |
| Department | Unisex-Adult |
| Directions | It is necessary to test the GH and KH to monitor water quality and prevent stressful conditions. |
| Is Discontinued By Manufacturer | No |
| Item Dimensions LxWxH | 2.75 x 1.63 x 5.13 inches |
| Item Package Dimensions L x W x H | 5 x 2.87 x 1.61 inches |
| Item Weight | 2.5 Ounces |
| Item model number | 58 |
| Item model number | 58 |
| Manufacturer | Mars Fishcare |
| Manufacturer | Mars Fishcare |
| Material | Plastic |
| Model Name | GENERAL/CARBONATE HARDNESS KIT |
| Number of Items | 2 |
| Product Dimensions | 2.75 x 1.63 x 5.13 inches; 2.5 ounces |
| Size | 2.5 oz |
| Style | GH & KH |
| Target Audience Keyword | Fish |
R**O
helpful tool for maintaining a healthy tank environment
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!
S**R
Good ammonia test kit
For ammonia testing this is the best one I found with the simplest instructions and the quickest results. Very easy to clean up afterward and be ready for next time
C**1
A must-have if you have pet shrimp.
GH KH testing is crushal for a shrimp and or a fish tank easy to use.
A**.
Good test
Bit pricey but test works great. The ph up and ph down not working at all.
V**V
I’m good
Pretty good testing kit I’ll give my pros and cons for the pros. This test kit is really good for trying to calculate your GHAKH if you’re keeping pets that need it personally for me it took a couple days to actually get a good reading of GHNK because it doesn’t have a color chart another pro is that they give you a number chart of how many drops in degrees your education should be a pretty good product. You’ll understand it after for the cons is that it’s really confusing at first. I want to say it’s the best beginner products unless you really know about your water chemistry but for anything else is pretty good
E**Y
works good
good test kit
S**A
Great product, fantastic company!
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!
A**A
Definitely a need if you keep fish
Truly a necessity, I'm doing a fish in cycle and have had the tank going for about a week now and my ammonia just tested to around 4 (really bad), did a 70% change and got it down to 1-2 and will continue doing small changes until my tank is cycled. My fish and snail were acting perfectly normal too so it was definitely a surprise!
A**R
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.
M**N
Its a must have for all fish keepers.
K**S
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..
T**R
easy to use and accurate. good to monitor hardness in fresh water aquarium
J**N
Good to have this to check, but all good
TrustPilot
1 周前
1天前