same thing happened with my friend plant with aero, bottom rotted out until the plant fell over and stem broke, so he just cut them in half and made them into clones, rooted in a day or so
i dont know.honestly, im not too worried about that problem because im scrog'in my AG. so most of the plants weight will be supported by the screen.
pictures soon kids!
You should start flowering those ASAP I think. How does the roots look in the tank? What is the color of them? Brown can mean they are dead and rotting and need to be cut out, then flush the system really good and add the peroxide to the tank at that time also (careful on the ratio percentage reoxide you use/buy).
From the looks of the last pics those plants look pretty healthy IMHO.....nice job!