yes that is your nute level or ppm ( parts per million)or EC (electrical conductivity) on the meter. ec and ppm are on different scales but ppm is simple(well for me ,that is what i learned) but they are the same thing. measure of the stuff(solids or nutes) in the water in laimans terms. that is why with a RO filter the ppm is near zero cause it is filtered clean. make sence? i hope soBrain said:In a recirc coco drip how would one measure nute level in the res? Will it show on the ec/ppm meter?