You shopuld see some increase in pH during the day if the macro tank is growing well.

It'll fall at night.

What you do not want is higher pH before the lights come on than your target 8.2-8.3 range, that may suggest a loss of Alkalinity.
Some pH change is fine as long as it's due to CO2 uptake. NO3 uptake will also increase pH (produces OH's) as will deposition of CaCO3 (many calcareous forming critters and plants/algae kick out OH's to cause the CaCO3 to form on their surfaces).

Lots of OH's and less acid.
So some increase would be normal.
As long as the Ca/alk is added, and the CO2/NO3 uptake is not too dramatic, things should go fine.

I've added CO2 to macro tanks but have not really seen dramatic improvements.
I'll do more on that later.


Regards,
Tom Barr

Thank you for all the help so far, Tom, I appreciate it!! Now it is just wait and see.

*grow, macros, grow!*