I just got done purging my hot tub and was going through and adjusting all the chemicals. I was reading in the how to use chlorine summary the it says to add ~50 ppm of Gentle Spa, which I have never done before but am app to try if it has good effects. I was just wondering if anyone else uses this product and if so the benefits. I am assuming it is talking about the Pro Team Gentle Spa product. Thanks in advance for your input.