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 sump tion are affected by a number of water
chemical variables. Being soluble to acidity, Corosex
will slowly dissolve and will need to be replenished periodically.
a per weight basis, magnesium oxide can neutralize five
times more acidity than can calcium carbonate. This results
in greatly reduced chemical usage for the same pH correction.
Please note; under certain low flow conditions, Corosex
may over correct and create a highly basic (high pH) condition.
certain hardness conditions, pH correction can cause hardness
minerals to precipitate out of solution, resulting in
cementing or solidification of the Corosex mineral bed.
Upflow service is generally recommended with hardness
exceeding five grains per gallon. (Always use an in-line
filter ahead of an upflow system to prevent plugging of
the lower distribution screen.)
Corosex’s magnesium oxide neutralizes the water,
it will increase hardness and a softener may become necessary
after the neutralizing filter. Corosex can be effectively
combined with Clack Calcite
to combine the high flow neutralization properties of
Corosex, along with the slower reacting low flow properties
of Calcite, reducing potentially
high basic properties due to overcorrection.
Bulk Density: 75 lbs./cu. ft.
Mesh Size: 6 x 16
Specifi c Gravity: 3.6 gm/cc
Effective Size: 1.4 mm
Uniformity Coefficient: 1.7
Composition: MgO 97% min.
service is generally satisfactory on waters with a
hardness of less than fi ve 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 Corosex 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
Max usage 100 mg/L