Hoskins said:The PH drop will turn the gas off so I dont understand your point.
say if you didnt have the computer... Injecting CO2 causes the pH to drop, and CO2 levels rise. Before the pH gets dangerously low (ie. <5.5pH) the CO2 will already be at 40ppm+ and your fish will be gassed and killed from the CO2 level, not the pH level.
So in affect, there is no need to be wary of the pH dropping to much, hence no need for the computer.
Does that make sense?