Hey guys. Just wanted to throw a general question out about CO2 generation. I just bought a propane CO2 Generator and was wondering if i should buy a envirenmental governer that will keep the CO2 ppm at 1500. Or should i send the extra money to buy a envirenmental governer that i can customize the CO2 ppm from anywhere from 1000ppm to 2500ppm. I am using a small tent and will plug 1 of the 2 burners. These are the products i have lined up now.