The BEST thing for boating since water!
I have a vinyl cover for my swim spa and could not find anything that was not oil or acid based. An e-mail inquiry to BTS confirmed for me that I did not need to worry about either of these two problems, and that BTS was a safe and effective product for me to use. And...boy was it! After getting oil in the spa from past products and spending nearly a month trying to clear up the milky water I was amazed at how fresh, clean, and clear my water became after using your product, and how fresh, clean and rain repellent my spa cover is now! I will never use anything else from now on, I promise! :)