Come September, and you’re thinking about soaking in your hot tub. It may have been a few months since you did that. Maybe you have had a new spa installed and are ready to enjoy relaxing in the swirling hot water. Either way, you must start (or restart) your hot spa correctly. It is easy to feel overwhelmed as a newbie or feel tempted to skip steps as a seasoned pro. It’s time to pull off the custom-fit aluminum Jacuzzi…