JBL KH Carbonate Hardness Test

Product Description

• Recommended level for fresh water: 4-8° dKH.
• 1 drop = 1° dKH.
• Colour change from blue to yellow.
• The number of used drops = level of carbonate hardness.
• For this reason this test does NOT require a color scale.
• The most important text in aquatics since the KH stabilizes the pH value.