API General Hardness & Carbonate Hardness Test Kit

API® GH & KH Test Kit

The API® GH & KH Test Kit measures general hardness (GH) and carbonate hardness (KH) to help you recreate the ideal water conditions for your freshwater fish and plants. Matching these parameters to their natural habitat reduces stress and supports long-term health and vitality.

Proper GH and KH levels are essential for maintaining stable pH, supporting plant growth, and ensuring a balanced aquatic ecosystem.

Key Features

• Tests GH (general hardness) and KH (carbonate hardness)
• Helps replicate natural habitat conditions for fish and plants
• Supports stable pH and overall water quality
• Quick, accurate, and easy-to-use testing

What’s Included

• 2 test solutions (bottles)
• Test tubes
• Easy-to-follow instructions