Many attributes at play here. Yes the clones are passed on any degenerative issues and diseases from the mom. Healthy moms healthy clones.
Sick moms pass that along and make sick clones that are then prone to pests and diseases. However this is only apparent in clones
the amount of seeds...
U can avoid the co2 in ur tent by upping your exhaust. Suck out all the stale air every minute and it will b replaced with co2 rich air every minute. Exhaust straight outside.
If u inject co2 and exhaust u are wasting money.
Plants breathe in co2 during the day, so it is a very essential part of the life cycle. How much depends on a lot of factors. In a negative pressure environment all of the air in the room is continuously being exhausted thus constantly filling the room with co2 rich air. In a closed environment...