Do a search; I think people have used baking soda as a buffer in lieu of purchasing the commercial buffers from lfs, but I don't think mixing with calcium chloride will achieve what you want
I do use baking soda.. but like SFS said.. dont mix them together haha. There is a sponsor here that sells the magflake stuff in bulk, thats actually what I've been using... you may check their website to see if you can get an idea.