Two Diy Co2 Units In Bedroom

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Will there be any health risks in running two DIY CO2 system to my two tanks? The tanks are in my bedroom which doesn't have much ventilation. One tank has a lid and the other doesn't. Also, most probably the CO2 doesn't dissolve completely (It is set so that the CO2 bubbles will go into the filter intake and get broken down by the impeller). May be I'm being paranoid, but I just don't feel comfortable about this. Any thoughts?
There is also a check valve in the airline tubing which may be leaking small amounts of gas.

 

[three-fingers]

On average we breath out 1kg of CO2 a day, so if you sleep in the room for even 12 hours (I love Sundays), that would be 500g of CO2 going into the air.

So even if a full standard 500g CO2 tank was to leak into the room overnight, it would just be like someone else sleeping in the room, and if the room cant handle that then it's unlikely to be legally fit for dwelling in.

 

[Mr Bliss]

Will there be any health risks in running two DIY CO2 system to my two tanks? The tanks are in my bedroom which doesn't have much ventilation. One tank has a lid and the other doesn't. Also, most probably the CO2 doesn't dissolve completely (It is set so that the CO2 bubbles will go into the filter intake and get broken down by the impeller). May be I'm being paranoid, but I just don't feel comfortable about this. Any thoughts?
There is also a check valve in the airline tubing which may be leaking small amounts of gas.

Most likely a significant portion of the CO2 you pump into the tank ends up escaping. CO2 doesn't like to stay dissolved in water, and the more CO2 you have in the water, the faster it escapes. The good news is, you have nothing to worry about. You yourself produce up to 500 grams of CO2 in one night. You would need to completely ferment 1 kg of sugar in one night to match that output. A typical DIY CO2 bottle produces up to 100 grams or so of CO2 before you have to change te mixture, so about 5 - 10 grams per 24 hours. So I'd be more worried about having another person in the room than a couple of CO2 bottles.

Humans can tolerate high CO2 concentrations. There's about 400 ppm CO2 in the atmosphere. You need to get to 5,000 ppm before it's generally considered unhealthy upon prolonged exposure (it's not recommended that people work in environments exceeding this limit); noticeable drowsiness may appear at 10,000 ppm. 50,000 ppm is considered toxic.

edit: beat'd. That'll teach me to leave the reply window open while watching a movie.