Bro, I'm not going to be able to help much with any kind of hydroponics... sorry. They look over-watered to me but, heck, they're sitting in water, so...what do you think it is ,over feeding heat or need to add some more calmag...
To be honest, I didn't know there was a such thing as an hydroponic, organic grow. Is it called that strictly because you aren't using chem ferts? Or, is there more involved?
nope...mg is bad stuff...im usin fox farms light warrior...lots of options out there...as usual someone a little more informative will come along but stay away from miracle grow please....even the organic..peace and green kharma