Liquified is taking a huge lead in the black tank sanitation supplies market. Launched just over a year ago, Liquified is already in the top three sellers with Amazon. In addition to being enzyme and bacteria based, which will break down the waste and help keep your black tank from smelling, it's also unique due to the specialty bottle that we use with a pre-measured spout. What's amazing for campground and dealership stores is you'll never see it being sold on Amazon for cheaper (except for Amazon Prime Day and Black Friday weekend.) We are the only sellers on Amazon so we can price protect it for you. Liquified also have 100% ROI which maximizes your profits better than any other products available today. Your cost for a minimum order is $299.88 (including shipping) and it will retail for a total of $599.76. ($24.99 per bottle.) If you still have concerns, your purchase will be risk free! If at anytime you decide it's not working, we will buy back your inventory. Check out our other listing for the smaller 16oz bottles as well! Please feel free to reach out with any questions!