Official PayPal Seal


Knowledge Base:  
You are here: Knowledge Base > Resin & Media Replacing
How and Why to use Acid Neutralizing Media Calcite and Corosex ( Magnesium Oxide )
Last Updated: 06/12/2013
If the water's pH is less then nuetral ( 7.0 ), then correction is required to prevent the water from corroding the metal in your plumbing.
Most common "symptoms" are blue stains from dissolved copper pipes, and iron staining problems from the water dissolving any iron ( in pipes or pumps or well casings ) that is has come in contact with.
A filter tank ( usually 10" x 54" ) is filled with either Calcite or Corosex ( Magnesium Oxide ).
Both are used to "raise" the pH of water that is acidic.
Which one and how much to use depends on the pH of your water. Calcite ( which is really just cushed marble ) dissolves slowly and is used when the pH is between 6.0 - 6.8 to raise to 7.0 - 7.5.
If the starting pH of the source water is less then 6.0, then Corosex may be needed as it dissolves faster.
And it is common to use a "mix" of 50/50 Calcite and Corosex.
These are media that must be ADDED to the Filter Tank every year ( anywhere from 6 months to no more than 2 years ).
And the way to "tell" is by checking the pH before and after the filter tank.
Also, you can measure the amount of media in the tank.
Normally the tank should be "filled" to about 60% full ( and not more, or you end up with media clogging the Valve during Backwash ), and not less than 30% full.
And note, there is always 5 - 8 inches of gravel used at the bottom of the tank as an "under bedding".
Occasionally the media becomes hard, and must be dumped and refilled with "fresh" media.
Or it becomes iron "fouled" and a complete re-bedding is the best way to improve the water quality.
This type of filter tank is almost always followed by a water softener used to remove the "hardness" added by the filter tank ( as the media dissolves it increases the hardness in the water ), and the softener can help remove iron that is often in the water.
see:
and
 
Common Tanks sizes and amount of media to use are:
9" x 48" = 15 lbs. Gravel and 1.0 cu.ft. media
10" x 54" = 20 lbs. Gravel and 1.5 cu.ft. media


Please Rate the Usefulness of this Article

Comments:
 

Related Articles
 > # 1 FAQ = High Water in Brine Tank - Problem -Softener does not remove the water from my salt tank or overflow
 > Links to Other Websites
 > Distributor Failure in Bottom of Resin Tank
 > How To Replace Media ( Carbon, Birm, Greensand, or Calcite ) in Filter Tank
 > Low Pressure Through Softener On Chlorinated Water
 > Low Pressure Through Softener On Well Water
 > No Pressure Unless the Softener is By Passed
 > How a water softener actually works and why does it feel slimy
 > Average Salt Amount Needed and Normal Water Level In Brine Tank
 > Salt Usage In Water Softening
 > No Salt Systems for Water Softening
 > Dishwasher Glassware Etching Cause Explained
 > Air in water lines after Softener Regenerates
 > Common Water Problems
 > ECO - Friendly Alternative to SALT Softeners
 > How do you determine if you actually need a softener?
 > How do you put a softener out of service without damaging it?
 > How Long Until Water Feels Soft Again After Repair
 > Hydrogen Sulfide levels affected by amount of water used and the ground water table
 > Will a Water Softener remove the iron from my water?
 > Iron Staining and my Water Softener seems to be working okay, Why is that?
 > Odor - Sulfur (Hydrogen Sulfide) in your water
 > I have a Water Softener, but I still have odor in my water. Why is that?
 > Orange Sand Coming Into House
 > Salty Water Taste in the Morning
 > High Water in Brine Tank - Problems and Solutions
 > Sodium in the Water Softening
 > What Brine ( Salt ) Setting Amount to Use?
 > Will a Water Softener make my water safe to drink?
 > Carbon replacement - How often should you replace the carbon in a whole house unit?
 > Stains in Laundry - several possible causes
 > Iron Filter, Greensand, MGS, Birm and Issues including Clogged Injector
 > Looking for someone to Service My Water Softner ( Softener ) in my area.
 > Adding Carbon to Resin in same Tank - Not Recommended
 > Pump Pressure Low or Cycles OFF and ON ( Well Water )
 > Stinky - Rotten Egg - Odor
 > Sodium Levels in Water when Softened
 > Air Check inside Brine Tank can becomes Stuck or Water Logged
 > Aerator Use and Cleaning Q & A
 > Air Check - Ball seated or dropping early during the BRINE/SLOW RINSE portion on the 155 or 255 Series Valve
 > Brine Valve Replacement in Salt tank ( with Float Shut Off )
 > UV for Water Purification - Does it Work?
 > Why Gravel is Not Needed in Residential Size Water Softener
 > Pyrolox - How To Replace / Use in Filter Tank
 > Frequency of Regeneration - How Often Should Softener Recharge?
 > Black water into the house in the morning after it has cycled ( regenerated )
 > Fittings Measurements Different Then Expected ( 1/4 and 3/8 fittings )
 > Choosing a Resin - What is the Difference
 > Whole House Carbon Filter - Which is best for city water?
 > Basic Installation Guide for New Water Softener
 > Which is better or cheaper... Powdered Resin Cleaners or Res-Up Liquid?
 > Fleck Valve - Greensand application - Purple Water After Regeneration
 > Choosing a Softener System - Which Brand is Best?
 > Sediment filter ahead of the softener - When, Why, and Which one.