Ensure all spa equipment is working properly.  Backwash the filter system following manufacturers directions.  Adjust pH to between 7.2-7.6.  When using other products as outlined in directions for this product, always follow directions on those products.  Fill spa bromine feeder with this product and adjust feeder following manufacturers directions to yield bromine residual between 2-4 ppm in residential spas and 4-6 ppm in commercial spas.  Check feeder regularly and add additional product as needed to maintain the bromine residual.  The pump and filter should be operated for at least 3 hours every day whether the spa is used or not.  Do not heat water above spa manufacturers recommended maximum temperature.  Keep the spa free of leaves and other debris.  To maintain clear, clean water and insure the performance of your spa chemicals, spas should be drained and refilled with fresh water every 60 days in residential spas or a minimum of every 7 days in commercial spas.