well i dont know about ppm meter but im pretty sure iv been ripped of with the nutes fuck thay better sort it out cuse ill cut sick the nutrients i ordered was called hy gen cornacopia and is a one part not tnis it says two part nutrient concentrate iv read the back of it and im 100 percent sure iv been ripped off it says a on the front of it and on the back theres instructions for a part be fuck im gunna have 2 put these in soil now owell no coco grow next time ill be getting every thing i need from bunnings i hope when i email them its just a mistake iim not happy with em tho my ppm meter when it did get a reading of basicly the first light so im guessing its 100 or under