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This precise water test for carbonate hardness is highly suitable for the use in aquaristics and stands out especially by its long useful life and the great number of tests that are possible.
Determination method is titration with hydrochloric acid against a mixed indicator whose colour changes when the pH reaches 4.5 (basis for the reaction in analogy to DIN EN ISO 9963-1 C24)
The term "carbonate hardness" is used for the part of calcium and magnesium ions present in the form of carbonate or hydrogen carbonate. Normally, carbonate hardness is smaller than total hardness. It is only larger under very special circumstances, which need to be cleared up. It is e.g. possible that alkaline hydrocarbonates were added or that the buffering capacity is very high.
The Germany company Macherey-Nagel GmbH & Co. KG has a long tradition, as it was founded in 1911. This company is an important manufacturer of chemical analytic products for professional use. Due to its specialisation in water tests, Macherey-Nagel is able to offer a vast product range particularly suitable for aquascapes and planted tanks. In the aquascaping and planted tank hobby, the colorimetric line of water tests Visocolor has gained a very good reputation, as these tests are very exact and have a long useful life.
Compared with many water test manufacturers that produce purely for aquaristic purposes, the knowledgeable customer service offered by Macherey-Nagel is on another level. This company helps their customers very well should they happen to run into a problem. For those interested in precise water tests the products by Macherey-Nagel are recommended as they will definitely meet their expectations.
Sehr gute Ablesbarkeit der Verfärbung (Farbumschlag) bei sehr niedriger KH (zB bei 1,5°KH). Preis auf den ersten Blick hoch, jedoch bei Haltbarkeit und Testanzahl absolut in... (mehr lesen)
Sehr gute Ablesbarkeit der Verfärbung (Farbumschlag) bei sehr niedriger KH (zB bei 1,5°KH). Preis auf den ersten Blick hoch, jedoch bei Haltbarkeit und Testanzahl absolut in Ordnung.
Einziger Nachteil: Messbehälter bei doppelter Flüssigkeit (10ml) etwas klein.