Those look amazing! I had some problems out the gate with mine; I should have been top-watering a bit more than I was and I think that really stunted the auto girls a bit. Kept waiting for this "root explosion" out of the net pots that didn't come, didn't come, didn't come. Finally, started top watering the hydroton a bit on a few of them as a test? 2 days later, roots popping out everywhere. Maybe it was a coincidence, maybe timing, who knows.
Are you running beneficials? These are all sterile. Well, sterile'ish, if you knew how long I went between rez changes on one or two of these

Have a gallon jug of 29% H202.
And let's just TALK about 29% H202. That's not wal-mart peroxide. Oh man. Didn't know. Had no clue. Was VERY careful when I first got the jug, regardless of not knowing. Didn't splash. Didn't make a mess. Until I was done adding it to the buckets? A tiny bit got on the lip of the measuring cup, which got on my fingers.
Ohhhhh HO HO HO HO HO what a BURNNNNN man!!! That's like pure acid on your skin! Turns it pure white and just burns sooooo bad

Doesn't matter how much water your run under it, it's burnin'. Don't accidentally get "manly itch" while working with this stuff, that's all I'm going to say!