Salifert Fresh KH Test - Carbonate Hardness (KH) Test for Freshwater Aquariums

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Salifert Fresh KH Test

Salifert Fresh KH Test is a drop test for measuring carbonate hardness (KH) in freshwater aquariums. KH (alkalinity) is closely linked to pH stability, making it an important parameter during water changes, aquarium set-ups and routine maintenance. The result is read by counting drops and checking a clear colour change.

What the test measures

- Carbonate hardness KH in dKH

Key features

- Fast drop test for routine freshwater water testing
- Clear end point colour change from blue to yellow
- Drop count method for quick checks during water changes and parameter adjustment
- Useful for monitoring pH stability in freshwater aquariums

How to use

- Fill the test vial with 5 ml of aquarium water
- Add reagent drops, mixing after each drop
- Stop when the colour changes from blue to yellow
- Use the chart to convert the number of drops into a KH reading

When to test KH

- During aquarium start-up and stabilising water parameters
- Before and after water changes
- If pH fluctuates or becomes unstable
- When changing the water source or using remineralisers