Clack Corosex Filtration Media
By neutralizing the free carbon dioxide in water, Corosex can correct acidic water conditions and render it less corrosive. Corosex, being a highly reactive magnesium oxide, is used most effectively where pH correction is substantial or high flow conditions are in use. pH correction and media con sumption are affected by a number of water chemical variables. Being soluble to acidity, Corosex will slowly dissolve and will need to be replenished periodically.
ADVANTAGES
• High degree of activity and speed of correction allowing high flow
• High capacity...less chemical usage
PHYSICAL PROPERTIES
• Color: Brownish white
• Bulk Density: 75 lbs./cu. ft.
• Mesh Size: 6 x 16
• Specific Gravity: 3.6 gm/cc
• Effective Size: 1.4 mm
• Uniformity Coefficient: 1.7
• Composition: MgO 97% min.
CONDITIONS FOR OPERATION
• Down flow service is generally satisfactory on waters with a hardness of less than five grains/gal. or where it’s combined with Calcite at least 50-50. Up flow service is generally recommended with hardness exceeding five grains/gal. to prevent cementing of the Corosex bed
• Use distributors designed for up flow applications
• A gravel support bed is rec om mended
• Water pH range: 4.5-6.0
• Bed depth: 24-30 in.
• Freeboard: 50% of bed depth (min.)
• Backwash frequently to prevent possible cementing
• Backwash rate: 10-12 gpm/sq. ft.
• Service fl ow rate: 5-6 gpm/sq. ft. but may be modified to adapt to local conditions
• Max usage 100 mg/L