It is important to understand that washing and buffering are two very different processes that accomplish two very different goals. While washing removes only elements soluble in water, buffering also removes elements, which are naturally bound to the cation exchange complex.
During the buffering process, coco coir cation exchange complex is saturated with a solution of calcium nitrate for an extended period. The absorbed calcium displaces the residual potassium and sodium in the complex, which is washed away. The buffering process also reduces problems with nitrogen draw-down that would occur in non-buffered coco peat.
Used for making varied different coir products, that is made out of the fiber extracted from coconut husk. Spun with traditional ratts and fully automatic spinning machines.

Buffering is especially important for growers who want to apply calcium and magnesium to their crops and/or growers who recirculate their drainage water. It gives growers more control over the amount of calcium provided to the crop and prevents excessive accumulation of salts if not draining to waste.
If the coco coir cation exchange complex is not buffered, the positively charged cations applied to the plants like calcium and magnesium will have a stronger attraction to the coco complex and become unavailable to plants (nutrient lockup), while potassium and sodium, less attached to the complex, will be displaced, come into solution and be taken up by the plant instead of calcium.

This leads to all sorts of crop problems - from excessive salt uptake by roots to calcium deficiencies, which is something growers wish to avoid at all cost. Calcium is a crucial regulator for plant’s growth and is involved in nearly all aspects of plant development. Some of the most noticeable signs of calcium deficiencies tend to appear on new, upper leaves and include dead spots, crinkling, spotting and mottling, small brownish spots, stunted growth, small and distorted new leaves, curled tips, leaf die-off, etc. Clearly not a situation a grower wants!
Buffering coco prevents all this since in buffered coco coir, the cation exchange sites have already been occupied by calcium while sodium and potassium have been washed away. Most coco coir being sold today is washed, but not all coco coir is nutrient buffered. Often the option of buffered coco is available but at an extra cost. Clean, buffered coco coir is the choice for any grower who wants healthy happy plants that reach their full potential..