ph is always supposed to be between 5.5 and 7. ph of 6.5 is ideal. I don't know about ppm though as I never monitor it. I may start though so I know when its time to change out nutes for sure.
SAP420 Reviewed by SAP420 on . Hydroponic Question Hey any one know what ph & ppm hydroponic water in resevoir is supposed to be at in flowering period Rating: 5