We hadn’t used our hot tub for about five years, but decided to get it up and running again for our use and especially for our two young grandchildren. We were concerned about using harsh chemicals. When we went to the Olympic Hot Tub store in Lacey, we found out about Silk Balance and have been using it for a year now. It works like a charm, and we have no issues with chemical smells, dry skin, stinging eyes, or cloudy water. And most of all, our grandchildren love their (reduced temperature) hot tub time! (Used just before nap or bedtime, mom and dad love it too – the best sleep they get!)