I was in a coco/perlite mix, so similar to hydro. As I recall, at least five fertigations per day with runoff. The mix was always off in pH with the water I was using at the EC level I used. No biggie as long as I dealt with it, but, to me, paying the cost of this stuff is not justified absent pH control. To make matters worse, the buffer system in the mix that normally controls the pH seemed to make adjusting it more difficult. I'll use up the bit that I have left from the small jars that I bought, and will not be buying more.
I have moved on to Jack's 321 for my indoor grows now. Dramatically cheaper, and effective. All I need to do now is learn about the details.