In addition: The box on the co2 tabs says the co2 bonds with the water 4-6 hours, so would this be ok if I would add it every watering? Or does the plant need continuous supply of co2?

Also, maybe opening of the closet for minute a day would be required?
Or, would only intake with a fan do the job?

Any input will be much appreciated:smokin:
Lowryder1 Reviewed by Lowryder1 on . Is intake and exhaust required with envirolites(200w)? High, I've got a project with 7 lowryder no.2's in a 60cmx120cm, 200cm tall growroom, I'll be using one 200w envirolite(white spectrum) until flowering starts, then add another one with red spectrum, use these until harvest. My question is, as these envirolites shouldn't produce much heat, will I be needing intake and exhaust? There would be one or two fans blowing towards the lamps and Co2 will be given with these: No Mercy Supply . I'll be turning the lights off for one hour each day Rating: 5