Temperature does not allow one product to work better or be less effective unless the time trial was very short. This test was anything but short. Bottom line is that the Ahh-Some product was up to 5,000times more effective than the one tested that is mentioned in these postings and outperformed all other purge products by a wide margin. Here is what you and all hot tub owners have to do. Purge your plumbing a minimum of 2 times a year. Just dumping water and not purging is helpful but not doing a complete job. Biofilm will proliferate in ALL hot tubs no matter how well you maintain it. Dealers are hesitant to tell potential customers about biofilm. I think you know why. We have hundreds of dealers around the world that purge every tub before they deliver it to the customer. These dealers are way ahead of the curve. There are still dealers in the industry that have no idea what biofilm is. Sad but true. Purge a few times a year and we will never see your future postings.