Okay next questions!
-Is that the pH of the reservoir, the runoff off your slab (this is MOST IMPORTANT!!!), or the RO right outta the machine (This is MEANINGLESS until you add your CalMAg and nutes).
-Are you running CalMag? You have to run it with RO water no matter what your system. Add it up to about 200-300 ppm before adding your nutes, THEN check pH, THEN adjust to 5.8-6.0.
-How often do you change out the res? Do you do a complete change or partial? If partial, what is the EC after refilling the water but before adding your nutes?
-Are you running by volume or by the EC numbers (mL per gallon or ppm overall)?

I really suspect that your #1 problem is a Calcium deficiency that is SO EASY to fix just by slapping some CalMag in there on your next res change.
stinkyattic Reviewed by stinkyattic on . slight yellow leaves any sugestions?? :cool: ok these are in week three of veg and there is a little yellowing of the leaves on the lower nodes any ideas???? i had a ph flux about a week ago for a day or two while i was out of town not to bad tho ....... i am using all holland secret nutes bada bang 5-0-2 bada bing 2-1-7 bada bloom 0-6-4 with liquid karma and some sweet citrus ...... any input would be great .... and stinkyattic i just want to say thanks for spending alot of time helping others it shows of good Rating: 5