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Neutralizers 2.5 Cubic Foot:
Your new 2.5 Cubic Foot Neutralizer Blend filter includes:
Calcite 200 lbs (4 50-lb boxes) 2.2 cu ft
Corosex 20 lbs (2 10 lb boxes) .26 cu ft
Troubleshooting the Fleck 2510 Neutralizer Filter
pH is Too High!
If the pH after your neutralizer is greater than 8.5, your pH kit may turn the color of the reagent, a purple
color. This is nothing to be alarmed about. In some cases, too much Corosex added to the neutralizer-
Calcite-Corosex blend can cause this problem; it almost never happens with Calcite only systems. If this
happens, set the backwash cycle frequency to every night for a couple of weeks, which will cause the media
to be washed more thoroughly and use up the excess Corosex. Alternatively, you can manually backwash it
several times on a given day, etc. Secondly, you can open up the bypass valves slightly, and allow some
untreated water to lower the pH by blending in some lower pH water. When you go to add more media in 6
to 12 months, just add less Corosex.
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 tank to raise the pH. 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 a majority of 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 contribute 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.
Page 12
Fleck 2510 Neutralizer Installation & Startup Guide
use 200 lbs Calcite and 20 lbs Corosex
www.cleanwaterstore.com
Rev 062714
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