co2 question

3hx3lx1.3w hydrofarm0.2-2.0 regulator 2.5lb bottle i need to know regulator setting for 15 min on 15 min off for 12/12 im lol just not smart enough to figure this equation out and i have to run my fans constant no other way all advice is helpful thanks

if you run 15on 15 off your tank will be empty in a day or so mabey 2. i run a tank that fires 3 times a day for 15 minutes on @ around 10 cfm, tank lasts about a month. it all depents on how many square feet you are trying to enrich, just google CO2 calculator.

i tried that too