Corosex® (Clack Part #A8011)
Clack Corosex (Part#A8011) |
MSRP: CDN$11.00 Starting at: CDN$8.62 Choose Option: In order to reduce shipping costs media orders may be split into multiple boxes and ship in clear plastic bags instead of the original packaging. Bulk quantity discounts available. For bulk quantities, please call 1-866-376-2690 for price quote.
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fast-acting pH neutralization media used for large pH corrections
Corosex® is a fast-acting magnesium oxide media used in high flow rate applications or where large pH corrections are required (raw water pH level of less than 6.0).
On a per weight basis, Corosex® can neutralize five times more acidity than can calcite. This results in greatly reduced media usage for the same pH correction. Under certain low flow conditions, Corosex® may overcorrect and raise the pH beyond the desired level. For this reason, it is usually blended with calcite at a ratio that achieves the desired pH correction without over-correcting during lower flow conditions.
Where the feed water is greater than about 5 grains per gallon (85 ppm or mg/l) of hardness, pH correction with Corosex® can cause hardness minerals to precipitate out of solution, resulting in cementing or solidification of the Corosex® mineral bed. To prevent this cementing effect, upflow service is generally recommended with hardness exceeding 5 grains per gallon (85 ppm or mg/l). If downflow configuration is used, frequent backwashing should be undertaken to prevent hardening of the media bed. This is generally effective where the Corosex® to calcite blend does not exceed 50/50.
Corosex® Advantages:
- fast acting
- capable of large pH corrections - effective over a wide pH range of 4.5 to 6.0
- certified to NSF/ANSI Standard 60
Corosex® Disadvantages:
- may over-correct
- increases water hardness
As Corosex®'s magnesium oxide neutralizes the water, it will increase hardness of the water and a softener may become necessary after the neutralizing filter.
Depending on the amount of water you use, your original pH level, and other water chemistry parameters, the Corosex® will need to be replenished as it is used up. Most customers have to add Corosex to their filter periodically. Corosex® filters are often designed with media fill ports either built in to the control valve or into the tank (dome hole tanks) for this reason. Corosex® filters can be run in downflow with a backwash control valve or in upflow with a simple "in/out" variety head. A gravel support bed is recommended.
We strongly recommended using a blend of Corosex® and calcite. Start with a relatively low ratio of Corosex® (10%) and continue increasing the ratio until the desired pH correction is achieved without over-correcting.
Corosex® is is manufactured by Martin Marietta Magnesia Specialties, LLC under the name FloMag® PWT 6x16.
| Operating Conditions / Requirements: | |||||||
|---|---|---|---|---|---|---|---|
| Service Flow Rate: | 5 to 6 GPM/ft2 | ||||||
| Flow Direction: | Upflow or Downflow | ||||||
| Backwash Flow Rate (Downflow Service): | 10-12 GPM/ft2 | ||||||
| Typical Freeboard: | 50% | ||||||
| Minimum Bed Depth: | 24 Inches | ||||||
| Recommended Bed Depth: | 24-30 Inches | ||||||
| Recommended pH: | 4.5 to 6.0 | ||||||
| Weight: | 75 lbs per Ft3 | ||||||
Corosex® is a federally registered trademark of Clack Corporation.
FloMag® PWT 6x16 is a trademark of Martin Marietta Magnesia Specialties, LLC
