API General Hardness & Carbonate Hardness Test Kit

API GH & KH Test Kit

API® GH & KH Test Kit helps measure general hardness (GH) and carbonate hardness (KH) in freshwater aquariums. These water parameters are important for recreating suitable water conditions for freshwater fish and plants, helping reduce stress and support long-term health.

Product Benefits

• Tests GH — general hardness
• Tests KH — carbonate hardness / alkalinity
• Helps match aquarium water to fish and plant needs
• Supports stable pH and better water quality
• Helps reduce stress caused by unsuitable water conditions
• Useful for maintaining a balanced freshwater aquarium
• Quick, accurate, and easy to use

Why GH & KH Matter
GH measures dissolved minerals such as calcium and magnesium in water. KH helps buffer and stabilize pH levels. Maintaining the right GH and KH helps create a healthier environment for freshwater fish and aquatic plants.

Suitable For
Freshwater aquariums, planted tanks, and aquarium keepers who want to monitor water hardness regularly.

Kit Includes

• GH test solution
• KH test solution
• Test tubes
• Easy-to-follow instructions

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