Hahha I get light burns with just grobo nutes with this generic recipe and no additives (I was told to pull the additives in the beginning but plant still experience minor burn tips and was poisoned by the old grobo, didnt make much of a difference) in the earlier stages. I think my plant could have used 1 more week in early veg to get a bit fatter before ramping up the ppm.
I also noticed that the grobo dosage is about 200 ppm above the GH recommended ranges with their floral series and the ppm is within range when 2 days into the new refill with daily top offs. I am not too concerned with minor burns as the leaves are removed by the time the tips are noticeably brown.
Next grow however, I will go by the plants height and size and respond based on ppm/ph daily ranges rather than just letting it grow on its own.