The carbonate hardness (KH) or alkalinity of a water sample characterizes the buffering capacity, i.e. the ability to maintain the pH value of the water.
Alkalinity (kh) is defined by the proportion of hydrogen carbonate ions in the water; other basic ions such as the hydroxide ions also contribute to the alkalinity as the pH increases. The alkalinity should be tested in all aquariums regularly. If the alkalinity in the aquarium is too low, the pH value can sink (sudden drop in acidity) to a level which is life-threatening for many fish and invertebrates. In reef aquariums, an adequate alkalinity is essential for strong coral growth. Alternatively, a very high alkalinity in saltwater tanks can lead to lime precipitates and also have a negative impact on coral growth.
Natural seawater has an alkalinity of 6.5 °dKH. The alkalinity in saltwater aquariums should range from 6 to 9 °dKH. To increase the alkalinity when levels are too low, we recommend using Balling Salts Carbonate or Elementals KH.
Test Kit Contents:
- 10 ml / 0.34 fl.oz. of reagent A
- 50 ml / 1.69 fl.oz. of reagent B
- 1 glass cuvette 10 ml
- 1 dosing syringe 5 ml
- 1 dosing syringe 1 ml with dropper tip
- 1 instruction for use
Reagents for this Test Kit (KH/Alkalinity) are available to order separately in affordable Refill Packs.
https://www.faunamarin.de/wp-content/uploads/2021/03/FM_HTU_AQHT_KH_EN_11-03-21.pdf
Safety Information: Keep away from children and pets. Flammable liquid and vapour. Keep away from heat, sparks, open flames, hot surfaces. No smoking.