General Hydroponics GH pH Up Liquid is a concentrated alkaline solution for raising the pH of nutrient solutions. It is ideal for use in hydroponic systems, as well as for soil gardens. The liquid solution helps to increase the pH level of the nutrient solution to the optimal range for plants to absorb the essential nutrients. GH pH Up Liquid is made with a blend of potassium hydroxide and potassium carbonate that helps to ensure that the pH of the nutrient solution remains stable. The solution is easy to use and helps to ensure that your plants get the essential nutrients they need for optimal growth and health. GH pH Up Liquid is an essential part of any hydroponic or soil garden's nutrient solution and is a must-have for any serious gardener.