Dubb is back, deficiencies deep water culture, help! rusty color, what is it!?

I didn't read this whole thread but just wanted to say that the pics in sept 8 post looks like overfert. Nothing screws up pH faster than overfert. Also, bear in mind that using a small grow space won't be enough, especially for hydro as they will easily outgrow a small space, when done right.

If your using RO or distilled water you can use 150 ppm cal mag, not 250. Too much is just as bad as not enough. Your plants are hungry, not overfed. If your using tap water you probably dont even need that. Distilled water, 150ppm cal/mag, add your bas nutes to bring the ppm to 800, let it sit for an hr, ph to 5.7, let it sit for an hr, if the ph is stable then run it.