API GH & KH Test Kit

Keep your fish healthy and thriving by testing your aquarium water's hardness regularly with the API GH & KH Test Kit. Water hardness has two components - general hardness (GH) and carbonate hardness (KH) - and matching both to your fish's natural habitat helps them thrive.

Key Features

• Tests GH and KH: Measures both general hardness and carbonate hardness in a single kit.
• Complete Kit: Includes a KH test bottle, GH test bottle, instructions and two capped test tubes.
• Prevents pH Swings: Detects low KH levels, which can lead to rapid, harmful pH shifts that stress fish.
• Duplicates Natural Habitats: Helps aquarists match water hardness to the conditions their fish evolved in.