Okay, I'm looking at your nutes and noticing that you aren't using a micro. Therefore things like Mn, Zn, Cu, etc are absent, and your plants really need them in hydro since they can't get them from the soil.

FloraMicro or a similar product sould solve that nicely.

Please post to the IBL/stabilized thread in Strains and Seeds with any info you have on Big Bud and its stability. I would be grateful!