Jack Herer Auto bubbler bucket #1

about week 6 of flowering? looks like 2 weeks left jacks 321 bumped up to 900ppm for a bit, but looked likt it was burning... sticking at 600ish checking ppm and pH everyday.... concentration of top up depends on ppm and ampount of water drank... premix 100% and cut with water to get desired ppm to maintain soln strength swap out evey 7 days or so.... whenh pH stats dropping instead of rising i know i need a swap i'll be more detailed as i go....