CarbonDoser v.1.0 Low pressure gauge

[Rimsky]

I have an old CarbonDoser v.1.0. I noticed that the low pressure gauge varies during the day. For instance, if I set it to 8 psi at 8:00AM and I look again at 8:00PM it may be at 7.5. psi. Is that normal? The pH in the Calcium Reactor is varying accordingly to this variation, so it seems it is actually impacting the amount of CO2 being released. Is that a sign that the CarbonDoser may need repair? Perhaps the low pressure gauge has to be replaced? Your guidance is appreciated.

 

[Rimsky]

It seems that the CarbonDoser needed more pressure on the low pressure side. I raised it to 10 and it seems more stable.