Balancers BioGuard Balance Pak™ 100 (2kg) Balancers BioGuard Balance Pak™ 100 (4kg) Balancers BioGuard Balance Pak™ 100 (8 kg) Balancers BioGuard Balance Pak™ 200 (2kg) Balancers BioGuard Balance Pak™ 200 (4kg) Balancers BioGuard Balance Pak™ 300 (2kg) BioGuard Balance Pak 300 Calcium Hardness Increaser Balancers BioGuard Balance Pak™ 300 (4Kg) Balancers BioGuard Balance Pak™ 300 (8kg) Balancers BioGuard Lo’N’Slo™ (1.5kg) Lowers pH and Total Alkalinity Balancers BioGuard Lo’N’Slo™ (5kg) Lowers pH and Total Alkalinity Balancers BioGuard Pool Acid 320g/kg Hydrochloric Acid Lowers the pH and Total Alkalinity in swimming pools. No Residue Hydrochloric (Muriatic) Acid Balancers BioGuard Stabiliser™ (2kg) Ultra Violet screening agent – prevents chlorine burnoff