600 Detergent, its a concrete masonry cleaner. Winter Reading: Be The Best At What Matters Most by Joe Calloway. Very good book, easy reading. Couple great quotes, I love when he talks about business and company's that make no money. Making things look nice and making people feel wonderful is all good and well but at the end of the day someone has to pay for something. If you're not making money you don't have a business, you have a hobby. Pick it up and read it, if you claim you're too busy get it on audible or itunes and listen to it while you plow or mow.