I don’t know why people always bad mouth Advanced Nutrients I know it’s costly for the home budget grower but you save money if you do it right the first time. I haven’t had to monitor ppm or ph at all what a time saver man. I mean this is my first coco run and I’m smakin this bitch with a 1000 par and she still wants more. But I’m not sure about the exhale bag I don’t have a good co2 meter yet I’m not gonna push the cap.