Omni pH Decreaser, 8 lbs Omni pH Decreaser 8# Granular chemical designed to slowly lower the pH of your swimming pools water Safer to handle and use than liquid acids such as muriatic (hydrochloric) or sulfuric A properly balanced pH is not only important for swimming comfort, it also helps keep your equipment and pool finish in good condition Many algaecides require the pH to be balanced in order to work properly