Home / Chemicals / Bioguard Balance-Pak-300 Calcium Hardness Increaser Bioguard Balance-Pak-300 Calcium Hardness Increaser Balance Pak 300 is a unique formulation for faster dissolving and less cloudiness. It boosts calcium hardness to help prevent equipment corrosion, etching of plaster and wrinkling of liners Category: Chemicals Tag: Bioguard Spread the love Related products Bioguard Spa Bromine Tabs Read more Bioguard Polysheen-Blue Water Clarifier Read more Bioguard MSA II Broad Spectrum Algaecide Read more Bioguard Spa Wellness Inspiration Soak Read more