thanks to your wee update, I've just noticed that my roots are outgrowing the pots an all... lol.
**gonna have to pot up, that'll teach me to put super auto's in 11ltr's lol.
I reckon you can start upping your strength's too man, mines seem to be doing away fine on 2ml grow and and 1tspn molasses per 2 litres, I'm gonna start upping mines once they are potted up, but I'm low on funds so I'll be mixing some coco I have spare in with my soil so they'll probs need it.