The Nutradip Tri Pack Calibration Kit 500ml is an essential tool for water management in any indoor or outdoor growing environment. This kit, manufactured by the trusted Nutri+ brand, contains all the necessary tools to calibrate pH and EC meters. The pH EC Tri Pack kit includes three 500ml bottles of calibration solutions for pH, EC, and temperature. The unique selling point of this kit is its convenience and accuracy, ensuring precise measurements every time. With the Nutradip Tri Pack Calibration Kit 500ml, growers can easily maintain optimal nutrient levels and pH levels for their plants. Title: Nutradip Tri Pack Calibration Kit 500ml (Default Title).