Adding mineral start-up ions to your pool water will allow you to easily raise the copper level in your pool. We recommend the use of mineral start-up ions for new Bionizer customers or customers who have emptied and refilled their pool (when copper reading is 0.0). For copper readings from 0.4 we recommend using the Bionizer boost function to accurately raise the copper level to the right level. A jar contains 150 grams of Mineral Start-Up Ions. Follow the instructions on the packaging or in Bionizer instructions to use the right amount for your pool.