Update:
Got some ntlabs kh buffer and now tank sits at 7.4 pH and 3 dkh before co2 and lights on.
According to the kh/pH table, I need to hit 6.5ph to get optimal co2.
Running at 2bps the pH does drop to 6.5 but only after leaving co2 on for 6 hours, an hour prior to it turning off.
So, do I...