it can test nature aquarium or reef tank. An aquarium 's happy life starts from here. KH test:Carbonate hardness is an indicator of the level of bicarbonate.In salt water is animportant buffer.bicarbonate will be dissociated and become HCO3-, CO3-,CO2,H+,OH-.etc. to stabilize the buffer system and maintain the pH value.Besides,KH willinfluence CO2 solubility and it is also the source of biogenic decalcificationfor saltwater plants.Content:1)1x22ml test reagent 2)test vial3)Color scale4)Instructions & recommendations

KH test kit