Advanced Nutrients Problems

I am running into a potassium deficiency using Sensi Bloom A+B and big bud in a Active Aqua ebb and flow bucket system

I have backed off big bud for the time being. After res change with only Sensi Bloom, Ppms range 950 to 1100, tap water ppms 265.

Any ideas to help out or run into the same problems?

i used advanced for the better part of a year and it was awful, no matter what i did or how i fucked with it. i recommend changing your nute regimen. i use botanicare now and the difference is astronomical, and i run a relatively low ppm- never above 950-1000, and it only gets that high during the last few weeks of flower.

I'm using Ph Perfect 2pt Sensi Grow/Bloom, what's your pH? I'm in DWC, but shouldn't be much different circumstances. And I don't believe changing your entire regimen is necessary. I've ran it from start to finish with only some Mag/Cal def, which was fixed by adding more A+B.

And I only run A+B, no additives but Hydroguard whatsoever. I keep mine around 5.7-.9

Hopefully this may help you figure out what your pH sweetspot is....I saw it browsing the forums and thought of this post. Personally, I doubt it's total accuracy. but I think it's on the right track...
*EDIT* Forgot to mention, K can get locked out in the presence of too much Calcium or Magnesium, and because Sensi already has C&Mg and your tap water is at 265 ppm, it may be possible that's locking it out. Just putting ideas out there...I hope I could help a little bit!