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 MSA II Broad Spectrum Algaecide Read more Bioguard Pool-Magnet Metal Stain Preventor Read more Bioguard Sparkle-Up Water Inhancer Read more Bioguard Lo-n-Slo Granular pH Decreaser Read more