Media Flomag


FloMag PWT magnesium oxide granular products are filter media specifically designed for potable water treatment. FloMag PWT is Certified by NSF to conform to the requirements of NSF Standard 60 for Drinking Water Chemicals – Health Effects under the Categories of pH Adjustment and Coagulation & Flocculation.

FloMag PWT is designed for point of use acid neutralization in potable water treatment. Typical applications include pH Adjustment of potable water with a pH greater than 4.

FloMag is a specially processed hard, bead-like magnesia, adapted for use in filters to neutralize acidity by increasing the pH value.

High degree of activity and speed of correction allowing high flow

Magnesium Oxide Physical Properties
Color Brownish white
Bulk Density 75 lbs./cu. ft.
Mesh Size 6 × 16
Specific Gravity 3.6 gm/cc
Effective Size 1.4 mm
Uniform Coefficient 1.7
Composition MgO 97% min.

Conditions for Operation
Downflow 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. Upflow service is generally recommended with hardness exceeding five grains/gal. to prevent “cementing of the Magnesium Oxide bed”
Use distributors designed for upflow applications
A gravel support bed is recommended
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 flow rate 5-6 gpm/sq. ft. but may be modified to adapt to local conditions