General Hydroponics pH Control Kit

Proper pH control is important to allow all plant nutrients to be available in nutrient solution. Having nutrient solutions that are too high (basic) or too low (acidic) can lead to nutrient defficiencies or toxicities, depending on the element. GH's pH Control Kit provides not only a pH indicator, but also pH controls (pH Up & pH Down) in 8 oz. bottles. Used to measure water pH.