I will look into a co2 meter. But we are running in a lot of outside air, as well as having the doors open a lot (thanks to our dogs) and our home isn't really a tightly sealed home (built in 70s)Check co2 in your home. if its high, you'll almost never get your PH up. Kalk dosing reverse lighting schedule will help.
I have a reverse lighting schedule going for the last month already.
I wondered about Kalk- will that raise my alkalinity? It is already at a good level.