I have my Co2 turn on 2 hours before lights turn on and my drop checker is a dark green. Lights turn on at 11am, by 1 or 2pm the drop checker is light green and by 3pm its yellow. Is my co2 gradually increasing or does the drop checker just take that long to register the readings. Should I have it running more then 2 hours before? I'm using a Cerge's style of reactor with canister filter.
Here is the pic I took yesterday when it was yellow.