I am running a freshwater tank, am trying to control my c02 what I want to do is:
I need co2 to come on at 7am till 3 pm, I want it to shut off during this period of time when ph reach 5.7.
after 3pm I want the co2 to shut off and the ph can drift all the way up (nocturnal changes only allow for 1 degree of ph shift).
any help
thanks