Do another flush NOW. Check the runoff pH and flsuh with water that is adjusted to compensate for it. There's a sticky at the top of this section on that.
Something BAD is going on. Either you have some of the worst overfert I've ever seen, or your pH is way off- that surprises me, because with pH problems they seem to creep up slower, and you say this was quite sudden. What is your water source? What is the pH of that water, and of your runoff? What are you using for soil?

Fill out the troubleshooting form. But before you do that, flush. You MUST get your soil pH to ~6.7 and clear out any excess ferts. How much guano did you use, anyway? You never answered that earlier in the thread, and it's kinda important...