Hi All Our first soak was Great!! water was 102 snow was falling (Ohio winter won't let go). My wife and I soaked for about 25-30min (It was perfect) and then gave the spa to our daughter and her 5 friends. She was having her 17th birthday party. They were in it for about 20 min and our power went off for the next 4hrs. Nothing wrong with the tub, all power in our area went off from the weather. They stayed out for another 10 min or so and came in. I could not shock it last night because no electric to run the pumps. So I checked the chlorine this morning and it was at 1ppm. I put in a pack of the instant shock today so we can go in today and will shock tonight. Let me know if anyone recomends anything else. The test strip looked good with ph alk .
