Yes, Danielle responded and told me to pull B-52 and not to PH the water prior to putting it into the grobo as it can raise the PPM, causing the EC sensors to shut off bottles 1 and 2 from dispensing anymore and correcting the PH.
They also had me do a drain / fill so that they can check the backend for the PH changes. They did not think its the probe faulty.
Also to combat the nute burns, I should add 1-2 cups of RO water into the reservoir in between dran/fills
The ball is now on their court, waiting for a response. Grobo does have a pretty good support service I must say.
@SWSVIC since were not supposed to be filling the grobo with the additives, how do you add your additives? I read somewhere you do some sort of injection, very interested.