..... i've read the thread. this is why i'm asking if anyone else is having issues with PH dropping. I'm using 3:1 bloom, 2ml mag pro, 5ml pro-tek at 600 ppm inr RO, ph lands at 5.8 when first mixing nutes. drops to 4.9 in a few days.
silly child, im going to assume that the res is too small.