C02 calculator says 15 minutes on twice a hour what kinda timer can i use. i only have 2 digitals with 8 programs will not work will it and have 1/2 hour increment pull up timers if i use these it would be putting to much in a once right. So what should i use. And do i have to have fans running and how long after the c02 kicks of do i start the fans. TEMP stays pretty constant in my room. I am running a hydrofarm ebb and flow and getting good results NEED MORE. I have almost 45 watts going per square foot from a 400 watt metal halide. Is there a timer that would work for my C02 that i could buy from lowes or walmart that will work. HELP A OLD FART OUT.
