New to Me Hot Tub

Just got a new to me hot tub delivered today. I got it from a buddy of mine. He drained it about a year ago, because he and his wife purchased a lake house a couple years ago. They just never had time to use it anymore, so he said if I wanted it I could have it. all I had to do was pay to have it moved. He said everything was working perfectly when he drained it. So now I have it, and I have never had a hot tub. I did read enough to know to purchase some Ahh-Some cleaner from Amazon. The Tub...

New to Me Hot Tub