In aquariums and fish farms, you need to be able to differentiate between Carbonate Hardness (KH) and Total Hardness (GH).
Carbonate hardness (KH or CH) refers to the ability of the water to maintain a stable environment and subsequently, the health of fish. The carbonate hardness is the ‘buffering’ ability of the water. To determine this on a photometer you need Palintest Alkalinity tablets, known as Alkaphot (part code AP188).
General hardness (GH) refers to the ‘hardness’ of the water caused by calcium and magnesium ions. Different aquatic species prefer different environments, some prefer ‘hard’ water and some prefer ‘soft’ water. The hardness of your water is often dictated by the source of the water. If it’s from groundwater it tends to be harder, if it’s from surface water it tends to be softer. To determine this on a photometer you’ll need our Hardicol reagent (part code AP254).
Sometimes the units dH are used. This means “degrees hardness”. Most test kits define results in terms of ppm CaCO3 means ‘parts per million equivalent to that of calcium carbonate’ – it doesn’t mean that the hardness is in this form.
1 unit dH equals 17.8 ppm as CaCO3.
Our range of photometers are the ideal solution for monitoring your Aquarium, with single and multiparameter platforms, you can select the solution right for you. Click here to view our range of photometers.
To view information about reagents and to search for ordering information, please click here.
29th May 2020
In this webinar, Palintest USA’s Bob Banker talks through water testing for pools and spas, discussing the use of digital methods to help ensure maximum safety and efficiency.
28th May 2020
We are delighted to be offering a range of webinars to help you learn more about water safety and how to improve your water testing procedures. Our webinars will cover a range of topics including water chemistry, application-focused testing and product training. Click here to view the full webinar schedule for June 2020.
21st May 2020
In this webinar we review the basics of pool and spa chemistry, including water balance and what is required to reopen your facilities. Starting with why you need to test your pool or spa, we then cover the key test parameters, frequency of testing, suitable test methods and tips for getting the best results.