The feeding chart is in EC, 1.5EC is about 750PPM or 950 on 700scale.Also, regarding the ppm differences with my mix and Mega's ppm calculator,
mixing up food for my 3 plants, 1.5 gallons and adding 8.75 grams, Mega tells my I should be at 530 ppm. I'm actually hundreds above that even when taking into account my water ppm. so for me to get nearer the lower ppm I would need to go back to the Veg area of the schedule.
perhaps I'll do that to get ppm down to around 500-600 for the rest of the grow, Kool Bloom on top of that