A few questions if I may. I have an inground pool with a paramount pv3 cleaning system. 1. Is there a specific place I can add chemicals for ph, shock, etc. without pouring them into the pool directly, or do I just pour them inro the water directly like other pools? 2. There are two skimmers and two holes in each. Which hole do I connect the vacuum hose to when I want to vacuum the bottom? 3. Is there anything else I need to do to prepare my system paramount and Hayward system before I start vacuuming? 4. Anything I need to do when I’m done before or after I disconnect the vacuum?