I don't think they're ready for an increase in nutes yet, have you got any pics? You could try putting a root stimulator in the res, i've just started using canna's rhizotonic and have had no problems but there's other products to choose from.

Have you checked your ph? You know for bubblers ph is meant to be lower that soil, somewhere between 5.8-6.2
hudson88 Reviewed by hudson88 on . Root Question..... I have started out 4 romulan haze that i picton up from a local seedbank. i germinated them and put then in thoughs peat pellets. after root started to stick out i then moved them to 5" net pot on a 5 gal bucket, each plant there own bucket. they have been in the bucket for almost 3 week now and they are no root that i can see ( i dont wana dig up the hydroton) as this is my first time with a sative n this type of system i have no clue wat i could of done wrong...unless root take longer to grow Rating: 5