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API TEST KIT, Different styles available, Monitors water quality and helps prevent invisible problems that can be harmful to fish, Fast, easy and accurate, Use weekly and when problems appear

4.7 out of 5 stars 1,596 ratings
Amazon's Choice recommends highly rated and well-priced products.
Amazon's Choice for "gh kh"

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GH & KH
  • Contains one (1) API GH & KH TEST KIT Freshwater Aquarium Water Test Kit, including 2 bottles of testing solution, 1 color card and 2 glass test tubes with cap
  • Helps monitor water quality and prevent invisible water problems that can be harmful to fish and plants and cause fish loss
  • Accurately measures GH & KH in freshwater aquariums
  • Water hardness is a measure of the dissolved mineral content of water and should match fish natural habitat to prevent fish stress and keep them healthy
  • Use for weekly monitoring and when water or fish problems appear
New & Used (20) from $7.42 & FREE Shipping on orders over $25.00

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Frequently bought together

  • API TEST KIT, Different styles available, Monitors water quality and helps prevent invisible problems that can be harmful to fish, Fast, easy and accurate, Use weekly and when problems appear
  • +
  • Seachem Equilibrium 600gram
Total price: $22.01
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From the manufacturer

Test Test Test Test Test Test
API QUICK START API AMMO-LOCK API pH UP API pH DOWN API NITRA-ZORB API PHOS-ZORB
Too much nitrites?
Too much ammonia?
Inappropriate pH levels?
Too much nitrates?
Too much phosphates?

Product description

Style:GH & KH

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 with color card, and two capped glass test tubes. With API Aquarium products, it’s easy to keep a beautiful saltwater, freshwater or reef aquarium. For over 50 years, API has been creating innovative, research-driven solutions that make it easier to care for your fish and aquarium. API Aquarium Treatment Supplies are designed to work in conjunction with each other to provide best results to control algae, promote healthy bacterial growth and help control and cure fish diseases and conditions such as ich and fin rot. They work to provide a safe, hospitable environment for fish such as tropical community fish, cichlids, goldfish and more. With API, you can spend more time admiring your fish, and less time scrubbing your tank. Make sure to use all products as directed in order to ensure the best results.


Product details

Style:GH & KH
  • Is Discontinued By Manufacturer : No
  • Product Dimensions : 2.75 x 1.63 x 5.13 inches; 4.16 Ounces
  • Item model number : 58
  • Date First Available : June 20, 2004
  • Manufacturer : Aquarium Pharmaceuticals
  • ASIN : B003SNCHMA
  • Customer Reviews:
    4.7 out of 5 stars 1,596 ratings

Important information

Safety Information

Please Read Instructions Before Use

Directions

It is necessary to test the GH and KH to monitor water quality and prevent stressful conditions.


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API TEST KIT, Different styles available, Monitors water quality and helps prevent invisible problems that can be harmful to fish, Fast, easy and accurate, Use weekly and when problems appear
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Customer Rating 4.7 out of 5 stars (1596) 4.5 out of 5 stars (4754) 4.2 out of 5 stars (2230) 4.6 out of 5 stars (2998) 4.8 out of 5 stars (430) 4.5 out of 5 stars (688)
Price $9.79 $7.09 $7.35 $14.67 $16.92 $13.99
Sold By Amazon.com Amazon.com Amazon.com Amazon.com Amazon.com SHOPBESTCOLLECTION
Item Dimensions 2.75 x 1.63 x 5.13 inches 3.50 x 1.75 x 6.50 inches 3.40 x 3.30 x 0.70 inches 1.81 x 1.81 x 3.75 inches 7.13 x 1.25 x 3.50 inches 4.72 x 2.17 x 2.17 inches

Customer Questions & Answers

Customer reviews

4.7 out of 5 stars
4.7 out of 5
1,596 global ratings
How are ratings calculated?

Top reviews from the United States

Reviewed in the United States on September 9, 2014
Style: GH & KHVerified Purchase
review image
68 people found this helpful
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Reviewed in the United States on April 17, 2017
Style: GH & KHVerified Purchase
21 people found this helpful
Comment Report abuse
Reviewed in the United States on August 22, 2020
Style: GH & KHVerified Purchase
5 people found this helpful
Comment Report abuse
Reviewed in the United States on March 8, 2017
Style: GH & KHVerified Purchase
19 people found this helpful
Comment Report abuse
Reviewed in the United States on September 30, 2016
Style: GH & KHVerified Purchase
17 people found this helpful
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Reviewed in the United States on February 2, 2019
Style: GH & KHVerified Purchase
4 people found this helpful
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Reviewed in the United States on October 22, 2018
Style: GH & KHVerified Purchase
3 people found this helpful
Comment Report abuse
Reviewed in the United States on August 8, 2020
Style: GH & KHVerified Purchase

Top reviews from other countries

Sean Byrne
4.0 out of 5 stars Fiddly to use, but appear accurate and easy to read
Reviewed in the United Kingdom on June 2, 2020
Style: GH & KHVerified Purchase
Jon
4.0 out of 5 stars Great unless you need to test for very soft (<1 kH) water
Reviewed in the United Kingdom on March 31, 2014
Style: GH & KHVerified Purchase
11 people found this helpful
Report abuse
Amazon Customer
5.0 out of 5 stars Essential tests that should be included in the Master Test Kit
Reviewed in the United Kingdom on May 28, 2020
Style: GH & KHVerified Purchase
review imagereview image
Redshark
5.0 out of 5 stars Easy and fun to use hardness test.
Reviewed in the United Kingdom on November 12, 2016
Style: GH & KHVerified Purchase
One person found this helpful
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Terry. T
5.0 out of 5 stars GH & KH Testing made easy
Reviewed in the United Kingdom on January 24, 2012
Style: GH & KHVerified Purchase
14 people found this helpful
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