So i have a pc box i havent used it yet though i still had to make a diy activiated carbon scrubber. my question is i know u attach the carbon scrubber to the exhaust fan but what about during the dark period when the fans go off, coudlnt the smell leak thru the intake fans since it wouldnt be on? so should i make 2 carbon scrubbers and put one on the exhaust and the intake. **assume that my carbon scrubber wouldnt reduce air flow much**