Yes mix up their own feed. I tried just watering it down but that is not the way to do it and still had issues as you loose your proper macro/micro ratios that way. I am about to flip and in ebb Flo hydroton and even thought they are turning into small bushes this time most are showing slight tip burn at .8ec (was at 650ppm on 700 scale) I dropped to 580ppm looking a bit better but still not down to .7ec.
So far the hydro route is not as bad as I expected but I am still concerned how things will go once I flip. Still going to keep feed down so long as I don't see any yellowing or other deficiencies. They look pretty good just the longer flowering ones seem to want less feed.
Is your PH consistent? Small drifts in pure hydro will start to raise N, not a problem for hybrids and indicas but could cause issues with pure sativas.