Dear Bro,
Hope the below information helps:
1) Its Buffers not Puffers
2) Buffers are not meant to be added nightly
3) What you need to dose in order to maintain pH at night is Kalkwasser
4) By cutting a hole in your pipping to your skimmer, you are reducing your skimmer performance
5) You can use 2 parts Solutions, Kalkwasser, Calcium Reactor to maintain Calcium, Akalinity & indirectly pH. Which ever method you chose, the applications and dosage is different.