Ebee -- Whenever anyone is having ion balance problems like yours, a ready solution is to drip some Calcium Hydroxide (i.e., Kalkwasser) for a while instead of using the prepared commercial solutions, such as
B-ionic and its various competitors and clones. Don't add any more baking soda to your tank either!
When the Kalk has levels balanced where you want them, if you really want to do so, you can go back to B-ionic or whatever. (I'd stick with Kalk.)
Try this: put 30ml of 5% Actetic Acid (or Distilled White Vinegar from the grocery store) in a 1 liter (1 quart) container. Disolve 1/2 teaspoon of lab-grade Ca(OH)2 (or Kalwasser mix from the LFS) in the Acetic Acid and then dilute to 1 liter (1 quart) volume with either RO/DI water or even tank water. (This is more Vinegar than some people are comfortable with, but I use it constantly with no problems.)
There should be no sediment in the mixture, but if there is let this precipitate out and just use the clear liquid. Drip this mix into your tank with an IV bag type doser (Kent makes a nice small and inexpensive one).
You don't say how big your tank is -- you can do multiples of the 1 liter recipe for large tanks. A few nights or a week of this should balance things out nicely and lift both your Alk and Calcium levels.
Don't forget to test for Magnesium, too, (
Salifert test kit) and keep your levels at 1500 ppm Magnesium. (I use Kent liquid Tech-M.) Good luck.