Shoot. You're one of those dirty hippies with the pure-organic grows!
I haven't the foggiest how else to add a lot of micro nutes really effectively and remain fully organic.
Troubleshooting an organic grow is HARD as you've seen. I hate to say it but this is enough of an emergency to go grab a bottle of GH micro or algoflash and swallow your organic pride for a moment anyway... or have a friend do it if you simply can't bear to spray the evil chemicals yourself... hahaha....

WH, lol @ Gravity chuckling... mine is doing the same thing... mocking me from next to the kitchen sink... saying 'you aren't happy wiht me as a fertilizer? try me as a marinade!!! I'm kelp-ily delicious!"