The sanitizer is a liquid concentrate used to sterilize your system of bacteria. It is designed to clean water systems without damaging seals and o-rings. Do not put hydrogen peroxide or bleach in your system. Doing so will damage the seals and result in leaks.
We recommend sanitizing water systems every year during the filter change. Sanitizing instructions can be found on the second page of the filter change procedure.
The sanitizer and safe and will not leave a toxic residue in your system.