08-28-2004, 01:09 PM
Join Date: Jan 2004
Location: Dallas, TX
iTrader Positive Rating: 100%
The simplest way to get your CO2 right would be to keep the CO2 running 24/7. So for a start leave the solenoid on all the time.
Later you can try to shut the CO2 down at night because if nothing else you will save CO2. Set the timer to shut the solenoid off when your lights shut off and to shut on when the lights go on. The next day check your pH and if it's too high you will have to reduce the time the solenoid is off.