Sorry Gran, was trying to fit in the word limit, 2 much info. DH20= distilled water ph 5.8. EC in micro s per cm. So 1454 would be 1.45ms/cm. My question can be broken into 2 parts. 1. Is it normal or a worry if the pH of run off is 6.8 for coco when I religiously add water and nutes at pH 5.8. Second, you think run off TDS of 724ppm after feed is high for auto? Thanks 4 advice ill tone it down. I was pleased to see after feed with TDS 1736ppm next day run-off was 900ppm so plant is absorbing nutes? Or have I got it wrong? Thanks for your time Gran, I've seen you've helped alot of people on this forum. May your future grows be fruitful:)