Thanks for the insight, my brain is RACKED with info on growing lol....Ph, ppm, cfm, you get the gist, we have all been a first timer before, but yeah I have a humidifier in there, was working like a charm till I beefed up the ventilation to attain negative pressure. Even tried putting it outside tent but that just made it worse, I think I will be alright but I’ll keep it updated on my diary👍🏼