I just changed my nutes today, I did 3ml each of the 3 part, 1ml of CaliMagic, .5ml of Floralicious plus, pH to 5.45 (it drifts up over the day to around 6.3). EC was .88 approximately...previous to that she'd basically been on water with a tiny little dab of nutrients, less than a milliliter of each. If I see any signs of nute burn within the next 36 hours, I'm going to flush her hydroton and start over with a lower dose. I think we're at identical stages of our grows...I wouldn't be above 1.0 EC, I'd try to aim for .8 or .9, I think you really need to let her stretch out before you push the nutes hard, that's more for mid to late flowering. Also remember this is different than DWC, so if you're following guys like Seymour-Buds and trying to replicate his results, I think you (or I for that matter) will have worse results. Hydro is all about "less" since there's no buffer, you can go a little crazier in soil and the inert material and micro-herd will save your ass.