Gelato Auto Week 5 (early pre-flower, 11cm, Biobizz soil All-mix & Light Mix) in a 2x2 tent, 80W LED, 350m³/h exhaust, 22C, 58% RH. Should I open my passive CO2 bag NOW with a 45m OFF / 15m ON exhaust timer during lights-on, or wait 10 days for bud bulking?