C02 newby

[420mooch]

just got a unis controller and 20ilb pound cylinder. i have 2 X 650 watt lumis running MH in vedge and osram red bulb in bloom in budbox xl tent. environment has been bang on for many a grow so im wondering do i use co2 during veg stage and stop 2 weeks before end of flower? and is it right that i do fifteen minute doses every hour?

many thanks :)

 

[420mooch]

air tightish budbox all the seams are taped up garden. its a 1.25x1.25x 6ft tent so its easy to control mate. our ppm in the city 600 without c02. so id easily maintain 1500 ppm. what tank are you on about? i have a unis controller and 20ilb cylinder c02.