In the world of dark devils. Yours is about the biggest I've seen my friend. Great job
Thanks buddy. Hopefully with a little more experience I'll be able to grow 'em even bigger.....giving them a flying start seem to be important and at the moment I've just been trying to keep the rockwool wet but apparently I should be letting it dry out a bit between feedings to encourage faster root growth. Once the roots are out of the rockwool and into the NFT tray the pump need to run 24/7 but before that it sounds like a 4 times a day timer might work better.
Or so says a commercial photo grower who seems to have tried just about every hydro technique going so I'll give it a go next time I'm starting seeds.
Other than with more experience the only other ways I reckon I could grow a bigger one indoors is with more light or aeroponics.