how long should i run my co2 for? run it the full time of the lights? lights are 3 t5ho 54watts each with indevisal reflectors and its over a 55 gallon. Right now im running 2 of the lights, i was thinking to have the 3rd come on for a hour for a noon burst. Not running co2 but its comming in the mail, but should i run the lights 8 hours and run the co2 for 8 hours? also how should my gauges look. like what levels?