How much Sodium Bicarbonate, Sodium Hydrogen Carbonate, or Alkalinity Up (referring to same thing: Baking Soda) do you put in your pool, month to month, or throughout the year?
Zero.
Never need it. My fill water has more than enough alkalinity in it.
Also, pH-Up products are almost exclusively soda ash (washing soda or sodium carbonate). Alkalinity-Up products are baking soda. Typically speaking, alkalinity raising chemicals are unnecessary unless you have acidic fill water (low TA and low pH) and/or you use acidic chlorine sources (trichlor/dichlor).
If you use trichlor, you will need about 1.14 lb bicarb per lb of tabs to compensate for the TA and pH drop. That's about 0.5 lb per 7 oz tab.
Other than that, you shouldn't need to add bicarb on a regular basis.
Do you have a test of your fill water? pH, TA, and CH.
I assume you have a proper test kit?
Can you add a signature? See Pool School - Getting Started
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How do you chlorinate your pool?
I was looking for what test kit you use. Not just for alkalinity. A signature would help us help you.
Take care.