Sanitizers to Clean Water.  Killing bacteria and preventing algae is a vital step. Sanitizers are the key ingredients of proper pool maintenance. Chlorine and bromine keep the water clear, protected from bacteria and help control algae. They are part of the BioGuard^® 3-Step Pool Care System. The SilkGuard Complete^® advantageThe best BioGuard sanitizers feature a unique blend of premium technologies that are found ONLY at BioGuard dealersSilkGuard technology makes water soft and smooth and prevents scaling, protects against corrosion and metal stainingSmartGuard^® technology makes tabs and sticks last longer than plain white chlorine products