API KH Carbonate Hardness Test Kit (Freshwater & Marine)

API KH / Carbonate Hardness Test Kit

API® KH Test Kit helps measure carbonate hardness (KH) in freshwater and saltwater aquariums. KH plays an important role in stabilizing aquarium pH and maintaining healthy water conditions for fish and plants.

Product Benefits

• Tests carbonate hardness (KH)
• Helps monitor aquarium water quality
• Helps prevent sudden pH swings
• Supports stable and healthy aquarium conditions
• Useful for determining the correct dosage of pH buffers
• Suitable for freshwater and saltwater aquariums
• Quick, accurate, and easy to use

Why KH Testing Matters
Carbonate hardness helps stabilize pH in aquarium water. If KH levels are too low, pH may fluctuate quickly, which can stress fish and affect overall aquarium health. Regular KH testing helps keep water conditions balanced and safe.

Suitable For
Freshwater aquariums, saltwater aquariums, planted tanks, and routine water quality monitoring.

Kit Includes

• 1 KH test solution bottle
• Test tube
• Color chart
• Easy-to-read instructions

Usage Reminder
Test aquarium water regularly and always follow the product instructions for accurate results.