Cheap coco is gathered from coconuts floating on the ocean surface. It absorbs salts which affect the PH of the medium. If the coco is cheap, you need to soak it in ph adjusted water first to correct the PH value of the medium. If the coco is made for mj (which I believe bush doctor products are, but best to check with the manufacturer) there is no need to soak, because the PH comes pre-adjusted right out of the package.
What he is asking, is if there are PH buffers added to the medium, used to control the PH factor.