hey, guys, I never said co2 is toxic gas, and never treat it like toxic gas...
so don't expect me to put on my gas mask or thinking that I wanted you to put on your gas mask, when playing with co2 equipment.
build some good number systems, and play with co2 tank all the time, never worry co2 would hurt me because co2 is not toxic gas.
The safety concern of CO2 is its concentration in air.
no matter how much and how you use it, if you stay in the environment where the co2 concentration is less than the point that cause trouble, it should be fine.
So what we have is a warning about a hazard that doesn't exist in normal use, based on information from an internet article whose URL includes "doomed globe" written by somebody who is likely a nut?
Isn't the internet a place to get some wonderful information to pass around to anyone would needs another worry? ?
If I ever hear of a planted tank fan being struck down by his CO2, then I might worry. But NOT if the info comes from the internet!
I don't know anything about the site contains any "doomed globe", but the page about the co2 concentration safety make no much difference if you google "co2 concentration safety", other websites will pop up and you will see pretty much the same description about co2 concentration safety, some are hard to read because too technical.