Salifert KH/Alkalinity Test Kit

Salifert has been my personally preferred brand of test kit for the past 22+ years.

Manufacturer's description:

With the Salifert KH/Alk Aquarium Test Kit, you can easily test the alkalinity level in your tank. A favorite of discerning reefers for years, Salifert Aquarium Test Kits feature easy to read results.

• Measures in sufficient small steps of 0.1 meq/L or 0.3 dKH with a sharp color change
• Precise color change, detecting small but significant fluctuations in KH/Alk
• Sufficient for 100-200 tests