API GH and KH Test Kit for Freshwater Aquariums, 2.5 oz

The API GH and KH Test Kit measures the two hardness readings that matter most in a freshwater aquarium. Water hardness reflects dissolved minerals and should match your fish's natural habitat to keep them comfortable.

• Measures GH and KH in freshwater aquariums
• Includes 2 bottles of test solution and 2 test tubes with caps
• Package size: 2.5 oz
• Supports weekly water monitoring

Test weekly and any time fish seem stressed, then adjust your water as needed.