Under sink reverse osmosis holding tanks can be a breeding ground for bacteria, if not properly maintained. Most people don’t realize they need to sanitize their tank, and the process usually involves tubing and a plastic syringe. No, thanks. That’s why we developed our patent-pending, TruPure RO Sanitizer that makes it easy to keep your AquaTru holding tank in pristine condition. Simply unscrew the TruPure RO Sanitizer, pour in the sanitizing solution, and complete the remaining sanitizing steps only once per year when you change your VOC filter. Just another way AquaTru ensures that you have pure, great-tasting water.