API - Freshwater/Saltwater Carbonate Hardness Test Kit - 1 Kit

Product Description
Tests tap water & fresh or saltwater aquariums for carbonate hardness (KH). Can be used to determine the proper dose of pH buffers.

Package Description: One Test kit

Serving Size: ..

Number of Servings: ..

Ingredients: Test Solution Test Tubes With Caps Instructions Computer-Analyzed Laminated Color Card To Read Results.


What is Carbonate Hardness?
Carbonate hardness (also known as alkalinity) is the measure of carbonate and bicarbonate ion concentrations dissolved in water. These minerals are present in municipal, well, and bottled spring water. The level of carbonate hardness in tap and bottled water depends on the source of the water and the treatment processes it has undergone. Carbonate hardness helps stabilize pH in the aquarium. An aquarium with a low kH level (50 ppm or less) will tend to be acidic. Aquariums with very low kH are subject to rapid pH shifts.

Directions for Testing Carbonate Hardness (KH):
Read thoroughly before testing. Do not allow test solution to get into aquarium.

To remove childproof safety cap: With one hand, push red tab left with thumb while unscrewing cap with free hand.

  1. Rinse a clean test tube with water to be tested.
  2. Fill the test tube with 5 ml of aquarium water (to the line on the test tube).
  3. Add carbonate hardness test solution, one drop at a time, holding dropper bottle upside down in a completely vertical position to ensure uniformity of drops. After first drop is added, solution will turn blue.
  4. Cap the test tube and invert several times after each drop. Keep count of the drops being added. Do not hold finger over open end of the tube as this may affect the test result.
  5. The test is completed when the water in the test tube, after having been shaken, turns from blue to yellow. If you have difficulty discerning the color after the first drop of test solution is added, remove the cap from the test tube and while holding it over a white background, look down through the tube.
  6. The carbonate hardness value is determined by the number of drops of the reagent that must be added to turn the water in the test tube to bright yellow.


The products sold on this site are not approved to diagnose, treat, cure or prevent disease. Information on this site including any product label or packaging should not be considered as a substitute for advice from a healthcare professional.


This Site is not intended to provide diagnosis, treatment or medical advice. Products, services, information and other content provided on this Site, including information that may be provided on this Site directly or by linking to third-party websites are provided for informational purposes only. Please consult with a physician or other healthcare professional regarding any medical or health related diagnosis or treatment options.


Always check the product label or packaging prior to using any product. If there are discrepancies, customers should follow the information provided on the product label or packaging. You should contact the manufacturer directly for clarification as to product labeling and packaging details and recommended use. Please also consult your physician for a complete list of indications, warnings, precautions, adverse events, clinical results, and other important medical information.

Free Shipping - All Orders Over $25


All Vitamin Grocer orders are shipped from the East Coast of the United States via DHL Global Mail's International Priority Airmail (IPA) Service (also know as DHL eCommerce).  DHL transports the package from the Vitamin Grocer warehouse to your local mail carrier who delivers the package to your front door.  Standard processing time is 2 business days or less.  Shipping time to Australia typically takes 14-20 business days.


In addition to Australia, we also currently ship to New Zealand, Japan, Singapore, Indonesia, Taiwan and Hong Kong.


All orders totaling $25 or greater ship for free to all of the above shipping destinations.

Orders totaling less than $25 are subject to a shipping charge of $7.50 per order.


[powr-price-table id=d2a66515_1506362020]




[powr-faq id=763758cf_1506362475]



Vitamin Grocer Australia

Property of Lycka, LLC

2221 Industrial Highway

York, PA 17402