pH/CO2 controller in CRS Tank

[Patrice]

Hi guys,
Is there anyone using pH/CO2 controller in CRS planted tank ?
Also I am wondering…
In my SSS grade shrimp tank (which is also my planted tank), is very hard to keep PH at 6.7 Therefore I want to use pH/CO2 controller (Milwaukee SMS122) in this tank.
For example if PH controller keeps the PH stable at 6.7 using CO2 in the day, would the CO2 level in the tank harm the shrimps at night if its on.

and if the PH controller is off at night, will it do Ph swings.
Thnx

 

[aqua_chem]

If you're using a pH controller, the pH will stay the same 24/7. You can just run the tank all night.

Although, depending on the KH, that pH might be too much co2.