API GH & KH Test Kit Fertilizer Components Pressure: >0

Pressure: >0

Is capable of storing excess nutrients

providing essential strontium for increased growth rates in corals

Patent self-floating design can automatically adjust water-level without effecting the function of filter system

API GH & KH Test Kit Fertilizer Components Pressure: >0When keeping freshwater fish and plants, the general hardness (GH) and carbonate hardness (KH) of aquarium water should match their natural habitat. The API GH & KH TEST KIT helps you duplicate the natural habitat of your fish to prevent stress, keeping them healthy! Contains 2 test bottles, easy to ready instructions, and glass test tubes