Cut the chlorine pack a 1/2” below the recommended cut line for optimal chlorination. With filter off, turn chlorinator adjustment knob to closed position. Open cover and insert chlorine pack Turn adjustment knob to 4 for the first day. Turn up by one increment daily as needed to achieve optimal chlorine dispersion. When getting a level chlorine reading leave knob at that level. Check the chlorine pack after 3 weeks. Replace when empty. Do not store chlorine packs near any pool or other equipment as the vapors are extremely corrosive. Maintain proper chlorine and PH levels and have water tested regularly to maintain total water balance.