CO2 too much??
My co2 comes on at 9 am and the lights come on at 11 am. By 12:30 to 1:0 pm., my drop checker is yellow and stays that way until 6:30 pm when it turns off. My fish seem to be ok. Some of my guppies and platys stay at the top towards the end of the day, but the rest of the fish act ok.
My question is, should I turn down my co2 so it takes longer to turn the drop checker yellow or just leave things as they are?