FlowMag PWT Granular Magnesium Oxide, 0.66 Cubic Foot Box
By neutralizing the free carbon dioxide in water, FloMag can correct red water conditions and render it to a non-corrosive condition. FloMag, being a reactive magnesium oxide, is used most effectively where pH correction is substantial or high flow conditions are in use. FloMag being soluble to acidity, will have to be replenished periodically.
FloMag can be effectively combined with Calcite to combine the high flow neutralizing properties of FloMag, along with the slower reacting low flow properties of Calcite reducing potentially high basic properties due to over correction.
FloMag can be mixed with Calcite to treat waters as low as 4.0 pH. Upflow filters are recommended unless the water is under five grains hard. A minimum of 50% calcite is recommended to prevent cementing.
Physical Properties:
- Color.......................................Grayish White
- Density....................................75 lbs/cu. ft.
- Effective Size..........................1.27 mm
- Uniform Coefficient................1.48
- Active Material (%).................84-90
- Composition - MgO................97% Minimum
Conditions for Operation
1) Downflow service is satisfactory on waters with a hardness of less than 5 grains or where it's combined with Calcite at least 50-50. Upflow service is generally recommended with hardness exceeding 5 grains to prevent cementing of the mineral bed.
2) A gravel support bed is recommended
3) pH: 4-6
4) Bed depth: 24-30 in
5) Backwash frequently to prevent possible cementing
6) Backwash bed expansion: 35% of bed depth
7) Service rate: 5-6 gpm/ft2, but may be modified to adapt to local conditions
8) Backwash Rate: 8-12 gpm/ft2
Upon installation allow bed to soak overnight before backwashing
