Tannin Acrylic Gel Strong Base Anion Exchange - "White Resin"
, Purolite A850 ( 8 lbs. minimum )
Added to regular softening beads ( ADDED as a layer 5 - 8 inches thick ON TOP )
to remove color from Tannic Acid in your well water supply.
* And normally you would NOT need to remove any of the beads already in the tank ( unless it's got old white resin, then 4 - 6 inches of these old Tannin beads can and should be removed first ).
8 - 13 lbs. ( at least 6 inch layer ) are normally required.
If your well water has a slight yellow or brown tint,
the addition of one pound per inch in diameter of your media tank
will normally make the water clear.
If your water is darker, like Ice Tea, you may need as much as two pounds per inch in diameter of your media tank.
While we have heard of using a separate tank just for this tannin removal, but we have always added these beads directly into the tank on top of the regular ones already in the water softener without removing any of the beads. An Upper / TOP - Distributor Screen/Basket is REQUIRED.
Would be the MD1203 "Top Distributor" for most valves made since 1997, or possibly, MD1207, or MD1206 for older valves.
The "color" or "tannins" are checked by running the water at the well for a minute or two, and then taking a sample in a white cup or bucket, or clear glass, and IMMEDIATELY observing the "color" before the iron has time to react with the air ( oxygen ).
ONLY if you have Color when water is first drawn, would you "need" the extra Tannin removal resin in with your regular softening resins.
Purolite A850 is a gel-type 1 strong base anion exchange with an acrylic matrix. The acrylic matrix ensures excellent removal of organic matter from a water supply in conjunction with its reversible removal upon regeneration.
Application - Organics ;Tannin Removal and Demineralization - Excellent Resistance to FoulingTank Diameter - How To Measure and Why It Matters