Good job on the save, but I don't understand. My CO2 runs 24/7 and the fish are fine.........never a sign of distress of any kind from the angels, the corys, the otos nor the guppies. The plants grow, the fish eat and the CO2 runs. Am I missing something?
It depends on the amount of CO2 you are injecting. What is the color of your drop checker? Mine is deep yellow by the end of the light cycle. 24/7 CO2 on my part without at least an air pump at night? I will see dead fish in the morning for sure.