Beginner grow Aerokit

I am 2 weeks in now so this is a bit of a catch up. I did start these in the traditional paper towel bed until I got a sprout and then transferred them straight to the aero kit. This meant that the roots get access straight away to the nutrients in the tank. first few days I just had PH balanced water The aero kit is easy to setup, 50l water, I have added half the nutrients to the water with the intention of upping this when everything has established, maybe about week 4, with half dose of Rhizotnic to help with root growth. Germinated 6 seeds, 2 didn't crack and lost the 3rd down the bloody drain and that was the only one that did germinate......aaaargh mutha fu..... of 3 DrRay DR lemon, so needless to say will never buy these......might have just been bad luck, did everything as with the rest that did crack, guess sometimes its just not meant to be... 1 Skywalker cookie, 1 Girl Scout cookie, 1 dr widow, these are the babies you now see in the aero kit, I intend to cut some clones from my tent and stick them into the aero setup as soon as I can... The sprouts are already looking healthy and are starting to shoot off at different angles so it all seem s to be going ok, This is diary number two, as I have 9 in a tent on about week 8 right now, I am trying to get a nice rotation on both grows so I can harvest every 6-8 weeks. This is all still a learning curve for me, but I think I have the beginning of green fingers!! lol. The aero cellotex tent has a 125w MH bulb which is on 24 along with a water pump on a timer, 1 hour on 2 off, but I can change my timings as and when, I ran it 24hours initially but then figured the plants need their rest as much as they need their feed, not sure what works best right now, but thought that giving them a break for an hour or two, would allow them to relax and breathe a little, I just had visions of my babies feeling like they were getting water boarded. Could almost hear the silent screams in between glug glug glug.....aaaaaaargggggghhhhhh.