Low Alkalinity, but high PH

No reason to raise alkalinity. And a TA of 65 is not a measurement our recommended test kits can measure. What test kit are you using.

Depending on your CH, a pH of 7.9 may be just fine too.
 
IF your TA is 70 -- then no baking soda is needed. That TA is just fine. When pH gets to 8, lower it to 7.6.
 
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