Mike, I did not realize the depth of it when you were here yesterday. I have some Salifert ph/dkh buffer that works much better than baking soda. I can mail some to you and you should have it by Monday at the latest, maybe tomorrow if it goes out fast. PM me your address if interested.
If you use baking soda, do you know about baking it in th eoven first? I can't remember if that is necessary to raise pH or to raise dkh. I read it in a thread while back.