Thank you.There are a lot of factors that go into how many bps you may want to run. You could start with a very low amount, like 1 bps, and then increase it from there as needed. A drop checker can help you determine how much CO2 you're injecting in the tank.
Many people put their CO2 systems on a timer so that it comes on 1-2 hours before the lights come on and then go off 1-2 hours before the lights go off. That way the CO2 is in the tank when the lights go on, but has left the tank by the time the lights turn off.