But are you forgetting that the pH Perfect feature means that the pH of your feed is irrelevant, doesn't matter (as you long you start with RO, distilled or other low salts water and minimize adding of salts, e.g., cal-mag, silica, etc.)? In fact, AN recommends no pH adjustment, which just adds more salts which interfere with pH Perfect's highly chelated nutrients being bioavailable to the plant over a relatively wide range of pH.