Prevents waterline residue and controls metallic stains and scale
Add this product before adding Boost or Free
One Quart - 32 oz.
Control's special formula prevents stain, scale and unsightly waterline film from forming around the perimeter of of the spa. Use at start-up and weekly as part of the Free Sanitizing System.
This chlorine-free, bromine-free, odor-free sanitizer is long-lsting and effective.
One Pint - 16 oz.