5900S Neutralizer Operation & Maintenance Manual
Page 25
www.cleanwaterstore.com
Rev 110117
pH is Too Low
This can happen if the water entering the neutralizer has a pH less than 6.0.
Generally, the water after your neutralizer should have a pH of 7.0, and the pH reagent in your
pH test kit should turn a light green to darker green depending on the pH.
Give your neutralizer some time, and after several weeks, if the pH is still coming out less than 7
and the test reagent is yellowish in color, you may need to add some Corosex to the neutralizer.
Contact our office if you don’t have any Corosex on hand and/or you ordered a Calcite‐only
system. The Calcite‐only systems work best if your water’s pH is between 6 and 6.9 and are
desirable as they add fewer minerals to the water, so it is best to start out with a Calcite only
system if your pH is 6.0 to 6.9. This works for most our customers.
White Spots on Fixtures and Glasses
Calcite neutralizers work by adding natural calcium minerals to the water. Many natural well
or spring waters that are acidic (with a pH of less than 7.0) are low in minerals and are
considered “soft” water.
This lack of natural buffering calcium minerals contributes to the corrosive nature of these
waters. After the water has passed through the neutralizer, the water will be higher in calcium
and “harder” but typically not hard enough to warrant a water softener, which removes calcium
hardness.
It is more common to see some white film or spotting on fixtures if you are using a blend of
Calcite and Corosex. In some cases, it might be that too much Corosex was used originally in
the mix of media.
If you are starting to see white spots and films on surfaces after the neutralizer has been
installed, you might want to take these steps:
•
Set the backwash frequency for every 3 days for a couple of months.
•
Check the hardness level before and after. If your hardness is higher than 5 grains per
gallon after the neutralizer, your neutralizer may be adding more minerals than is
needed, and you can open the bypass valves a slight amount to blend in some untreated
water.
•
Check the pH before and after. You only need the pH to be in the 7.0 to 7.5 range. If the
pH is higher than that, you may be adding more Corosex than is necessary.
