Hi I have pressurized CO2 in a 55g. I switch it off during the night using a timer and then switch on an airpump to help oxygenate the tank. CO2 monitoring is done using a calibrated PH meter and test for KH and then use the table for reference. The thing is during the day I maintain a PH level of 6.7 - 6.9. But during the night it decreases to 7.5 because of the circulation. Also during the day it takes time to rise back to the desired range.
Am I not supplying enough CO2?
Thanks.
Am I not supplying enough CO2?
Thanks.