After you have filled the pool and taken the cover off, before you do anything else, please vacuum your pool to waste. This will remove all of the dirt and algae that have settled out over the winter before your pump and filter get a chance to stir it up. We recommend you vacuum your pool to waste, fill the pool back up, turn to filter, and run the pool for 24hrs. After all of that is completed, please bring in a water sample so that we can get you going on your chemicals! As always, if you have any questions, please call, 618-775-6543. ?